Ages 8-12; Gr.4-6.
When a mysterious little free library (guarded by a large orange cat) appears overnight in the small town of Martinville, eleven-year-old Evan plucks two weathered books from its shelves, never suspecting that his life is about to change. Evan and his best friend Rafe quickly discover a link between one of the old books and a long-ago event that none of the grown-ups want to talk about. The two boys start asking questions whose answers will transform not only their own futures, but the town itself.

Lexile measure 780; Ages 8-12; Gr.4-6.
A "witty thriller" for middle-grade readers about how the Mona Lisa was stolen from the Louvre, how the robbery made the portrait the most famous artwork in the world--and how the painting by Leonardo da Vinci should never have existed at all.

Ages 8-12; Gr.3-7.
On the day they are born, every Swift child is brought before the sacred Family Dictionary. They are given a name, and a definition. A definition it is assumed they will grow up to match. Shenanigan is getting ready for the big Swift Family Reunion and plotting her next great scheme: hunting for Grand-Uncle Vile's long-lost treasure. She's excited to finally meet her arriving relatives--until one of them gives Arch-Aunt Schadenfreude a deadly shove down the stairs. So what if everyone thinks she'll never be more than a troublemaker, just because of her name? Shenanigan knows she can become whatever she wants, even a detective.

Ages 8-12; Gr.3-7; Lexile measure 610; Guided reading level W.
The 2022 Edgar Award Winner for Best Juvenile Mystery! What if you had no name, no past, and no home? Ivette. Joanna. And now: Katrina Whatever her name is, it won't last long. Katrina doesn't know any of the details about her past, but she does know that she and her parents are part of the Witness Protection Program. Whenever her parents say they have to move on and start over, she takes on a new identity.

Lexile measure 750;Ages 8-12; Gr. 4-8.
Link, Michael, and Dana live in a quiet town. But it's woken up very quickly when someone sneaks into school and vandalizes it with a swastika. Nobody can believe it. How could such a symbol of hate end up in the middle of their school? Who would do such a thing? Because Michael was the first person to see it, he's the first suspect. Because Link is one of the most popular guys in school, everyone's looking to him to figure it out. And because Dana's the only Jewish girl in the whole town, everyone's treating her more like an outsider than ever. The mystery deepens as more swastikas begin to appear.

Lexile measure 420; Ages 7-9; Gr.2-4.
King, Kayla, and Grandma find a dog who has lost his human family. What does Kayla know?This dog doesn't have a collar or any tags. He can sit, lie down, and shake hands. No one around here knows who he is. What does King know?

Lexile measure 870; Ages 8-12; Gr.4-6.
Aspiring Professional Adventurer Mr. Penguin and his colleague, Colin the spider, try to find a treasure rumored to be buried in The Museum of Extraordinary Objects before bandits do.

Lexile measure 450; Ages 7-9; Gr.2-4; Geisel award honor book, 2019.
Kayla lost a tooth, but now it's missing! What does Kayla know? ?Her tooth is not inside the tooth fairy pillow. It's not inside her backpack. It's not inside the car. What does King know?

Lexile 710L; Ages 8-12.
When Lizzie and Gael share an irresistible challenge, to find the peacock ring that once belonged to artist Frida Kahlo, Paloma decides it is the perfect way to honor her father.

Lexile measure 610; Ages 9-13; Gr.4-6.
When Candice finds a letter in an old attic in Lambert, South Carolina, she isn't sure she should read it. It's addressed to her grandmother, who left the town in shame. But the letter describes a young woman. An injustice that happened decades ago. A mystery enfolding its writer.

Lexile measure GN460L; Ages 9-13; Gr.3-6.
Cici dreams of being a novelist. Her favorite subject: people, especially adults. She's been watching them and taking notes. Everybody has one special secret, Cici figures, and if you want to write about people, you need to understand what's hiding inside them. But now she's discovered something truly strange: an old man who disappears into the forest every Sunday with huge pots of paint in all sorts of colors. What is he up to?

Ages 8-12; Gr.3-6.
"A dead person?" asks eleven-year-old Esme. How intriguing! She has just learned that she is going on a journey in search of a dead person. Was she going to a cemetery? Or maybe to a funeral? By train, by gypsy wagon, and even by ostrich, Esme takes a summer journey.

Lexile measure 440; Ages 7-9; Gr.2-4; Guided reading K; Geisel Award honor, 2018.
Kayla made peanut butter treats for Jillian's new puppy Thor. But now the treats are missing. What does Kayla know?

Lexile measure HL780L; Ages 9-13; Gr.3-7.
From National Book Award finalist and Printz Award winner Laura Ruby comes an epic alternate history series about three kids who try to solve the greatest mystery of the modern world: a puzzle and treasure hunt laid into the very streets and buildings of New York City.

Lexile measure 670; Ages 8-12; Gr.4-6.
High on a cliff above the gloomy Victorian town of Withering-by-Sea stands the Hotel Majestic. Inside the walls of the damp, dull hotel, eleven-year-old orphan Stella Montgomery leads a miserable life with her three dreadful aunts. Stella dreams of adventuring on the Amazon--or anyplace, really, as long as it isn't this dreary town where nothing ever happens. Then one night Stella sees something she shouldn't have. Soon she finds herself on the run from terrifying Professor Stark and his gang of thugs.

Lexile measure 840; Ages 8-12; Gr.4-6.
Detectives' Row is full of talented investigators, but Toby Montrose isn't one of them. He's only an assistant at his uncle's detective agency, and he's not sure he's even very good at that. Toby's friend Ivy is the best sleuth around--or at least she thinks so. They both see their chance to prove themselves when the famed Hugh Abernathy announces a contest to choose the World's Greatest Detective.

Lexile measure 910; Ages 8-12; Gr.3-7.
Twelve-year-old AJ is dreading spending the summer with her uber-strict grandmother--that is, until she's recruited to join Grandma Jo's heist club--in this hilarious and quirky twist on a summer vacation story.

Lexile measure 690; Ages 9-12; Gr.3-7.
After leaving Lockwood & Co. at the end of The Hollow Boy, Lucy is a freelance operative, hiring herself out to agencies that value her ever-improving skills. One day she is pleasantly surprised by a visit from Lockwood, who tells her he needs a good Listener for a tough assignment. Penelope Fittes, the leader of the giant Fittes Agency wants them--and only them--to locate and remove the Source for the legendary Brixton Cannibal.

Lexile measure 490; Ages 7-9.
Meet Myron: a third-grade detective who loves logic, facts and solving mysteries. He does not love new things. Unfortunately, everything is new this year: Myron has a new baby sister, his family has moved across town, and now he's starting his first day at a new school. But when the school kitchen is burgled, leaving the morning snacks nowhere to be found, Myron gets his chance to crack the case with help from his classmates from Resource Room 15. Myron's unique perspective from the autism spectrum makes him a top-notch sleuth.

Ages 9-12; Gr.4-6.
Eleven-year-old Nell Warne arrives on her aunt's doorstep lugging a heavy sack of sorrows. If her Aunt Kate rejects her, it's the miserable Home for the Friendless. Luckily, canny Nell makes herself indispensable to Aunt Kate...and not just by helping out with household chores. For Aunt Kate is the first-ever female detective employed by the legendary Pinkerton Detective Agency.

Ages 8-12; Gr.4-6.
Welcome to Stately Academy, a school which is just crawling with mysteries to be solved! The founder of the school left many clues and puzzles to challenge his enterprising students. Using their wits and their growing prowess with coding, Hopper and her friend Eni are going to solve the mystery of Stately Academy no matter what it takes!

Lexile measure 710; Ages 9-13.
Medical science combines with mystery in this G.A.S. adventure about concussions. Is the awkward stranger taking bribes to throw games? When Clinton hits his head in the championship soccer game, the stranger gets him benched, and Clinton's team loses. Determined to nail the bribe-taker, Clinton and Mae take on a new G.A.S. mission--a journey across three continents and 4,000 years to learn about concussion and the brain.

Lexile measure 850; Ages 9-13,
With time travel and mysteries that need solving, the Galactic Academy of Science (G.A.S.) series instructs readers on how to think like scientists. Under the guidance of a Dude or Dudette from the future, the middle school characters are faced with treacherous, present-day crimes that require a historical knowledge of science in order to be solved.

Lexile measure 550; Ages 7-10; Gr.2-4.
Danny and Calvin decide to find out why their fourth-grade teacher, Mrs. Cakel, is suddenly behaving very strangely by not only failing to enforce her many rules, but by violating some herself.

Ages 9-12.
John Hawkins is in yet another new school as he begins the 7th grade. His life would be just fine except for the fact that Dowser, the school bully, has it out for him. Things change when his passion for robotics lands him an invitation to be a part of a secret club. John joins Malena, Hector, Natsumi, and Kimmey as the newest member of the League of Scientits. Together, these friends pool their knowledge of biology, technology, logic, and chemistry to unravel the mysteries that haunt their quiet town of East Rapids.

Lexile measure 800; Ages 10-14; Gr.4-7.
It's wintertime at Greenglass House. The creaky smuggler's inn is always quiet during this season, and twelve-year-old Milo, the innkeepers' adopted son, plans to spend his holidays relaxing. But on the first icy night of vacation, out of nowhere, the guest bell rings. Then rings again. And again. Soon Milo's home is bursting with odd, secretive guests, each one bearing a strange story that is somehow connected to the rambling old house.

Ages 7-11; Gr.2-4.
A detective in the wild. Young Precious gets a very special treat. She gets a trip to visit her Aunty Bee at a safari camp. While there she makes a new friend, a boy named Khumo, and meets an actor-lion named Teddy, who is starring in a film. When Teddy disappears, Khumo and Precious will brave hippos and crocodiles as they search for the missing lion.

Lexile measure 740; Ages 9-13
This time-traveling journey on the science and history of death takes the G.A.S. crew to China, Italy, Belgium, Haiti, New Guinea, Arizona, and Indonesia. Along the way, Sam faces his greatest fears and grows braver, but when disaster threatens his father's research camp, can he figure out how to save his father, outwit the evil Dr. G, and turn the tables on the bullies who have been tormenting him?

Lexile measure 670; Ages 11-15; Gr.4-7.
Lockwood & Co. are hired to investigate Edmund Bickerstaff, a Victorian doctor who reportedly tried to communicate with the dead, while Lucy is distracted by urgent whispers coming from the skull in a ghost jar.

Lexile measure 720; Ages 8-12; Gr.4-7; Guided reading V
"Twelve-year-old Kyle gets to stay overnight in the new town library, designed by his hero (the famous gamemaker Luigi Lemoncello), with other students but finds that come morning he must work with friends to solve puzzles in order to escape"

Lexile measure 750; Ages 9-13.
Mae and Clinton are fighting about whether a new vaccine is safe. But when protests against the vaccine threaten to turn violent, Selectra Volt insists that the two middle schoolers go on a mission together to find the truth. Mae and Clinton travel through time from ancient India to Europe, Australia, and North America. They witness the fight against smallpox, rabies, polio, and other viral illnesses as they visit Louis Pasteur, Jonas Salk, Macfarlane Burnet, Maurice Hilleman, and Andrew Wakefield.

Lexile measure 750; Ages 9-13.
When the Russian scientist Professor Gufov accuses Clinton of stealing his invention, all Mae and Clinton want to do is get away and work on their science project. But that's before a Dudette from the future tells them about the Galactic Academy of Science and sends them on a mission back in time to beef up their scientific knowledge.

Lexile measure 860; Ages 8-12; Book level 5.3; Gr. 4-7; 2011 John Steptoe New Talent (Author) Award. A fictionalized account of Zora Neale Hurston's childhood with her best friend Carrie, in Eatonville, Florida, as they learn about life, death, and the differences between truth, lies, and pretending.

Lexile measure 750; Book level 4.5; Ages 10-13; Gr.4-7; Guided reading W.
Shortly after a fall-out with her best friend, sixth grader Miranda starts receiving mysterious notes, and she doesn't know what to do. The notes tell her that she must write a letter--a true story, and that she can't share her mission with anyone. It would be easy to ignore the strange messages, except that whoever is leaving them has an uncanny ability to predict the future. If that is the case, then Miranda has a big problem--because the notes tell her that someone is going to die, and she might be too late to stop it.

Lexile measure 720; Book level 4.8; Ages 8 and up; Gr.3-5; Guided reading R.
When fairy-tale detectives Sabrina and Daphne Grimm venture back to the big city to help a friend, they land in the middle of a big mystery. Puck's father, King Oberon, has been murdered, and the Grimms suspect one of the many famous (and infamous) fairy-tale folk who call the city home.

Lexile measure NC700L; Ages 8-12; Gr.6-8; Guided reading U.
After Marvin, a beetle, makes a miniature drawing as an eleventh birthday gift for James, a human with whom he shares a house, the two new friends work together to help recover a Dürer drawing stolen from the Metropolitan Museum of Art.

Lexile measure 770; Ages 8-12; Gr.3-7 Guided reading T.
When a book of unexplainable occurances brings Petra Andalee & Calder Pillay together, strange things start to happen: seemingly unrelated events connect, an eccentric old woman seeks their company, & an invaluable Vermeer painting disappears.

Guided Reading Level V; Lexile measure 750; Ages 9-12; Grade level 6.1
The mysterious death of an eccentric millionaire brings together an unlikely assortment of heirs who must uncover the circumstances of his death before they can claim their inheritance.