Ages 2-5; Geisel award winner, 2020.
In this very young picture book mystery, a little boy out for a walk with his family stops to show a building doorman his new "bot"- "I have a bot!" Only he doesn't have it for long, because it floats up out of his hands like an escaped balloon. "Stop! Bot!" Springing to action, the kind doorman runs up to each floor of the building to try and catch it -- along with the help of each floor's resident.

Lexile measure 210; Ages 4-8; PrK-Gr.1.
Who is Baby Monkey? He is a baby. He is a monkey. He has a job. He is Baby Monkey, Private Eye! Lost jewels? Missing pizza? Stolen spaceship? Baby Monkey can help!

Ages 6-10; Gr.1-5,
Ada Lace--third-grade scientist and inventor extraordinaire--has discovered something awful: her neighbor's beloved Yorkie has been dognapped! With the assistance of a quirky neighbor named Nina (who is convinced an alien took the doggie) and her ever-growing collection of gadgets, Ada sets out to find the wrongdoer.

Lexile measure AD530L; Ages 5-7; K-Gr.3.
6 has a problem. Everyone knows that 7 is always after him. Word on the street is that 7 ate 9. If that's true, 6's days are numbered.

Lexile measure 550; Book level 3.2; Gr.1-4; Ages 5-10.
Detective Joe Dumpty rushes to investigate the mysterious circumstances under which his older brother, Humpty, fell from a wall on his first day as captain of the new neighbourhood watch programme.

Guided Reading Level O; Lexile measure 510; Ages 5-9
The Boxcar Children are spending a weekend at Goldwin University for Grandfather's college reunion. They are immediately fascinated by the tall, mysterious clock tower that overshadows the campus.

Guided Reading Level O; Lexile measure 530; Ages 5-9
While visiting a small town in Alabama, the Aldens hear mysterious howls at midnight, leading them to wonder if an old local legend about a ghost dog is true.

Guided Reading Level O; Lexile measure 560; Ages 5-9
While staying at the Crooked House, the family home of their housekeeper Mrs. McGregor, the Aldens try to solve a riddle that will lead them to a hidden treasure.

Guided Reading Level O; Lexile measure 550; Ages 5-9
Grandfather's new land in the Rockies comes complete with an abandoned town and old silver mine. There is even a ghost floating through the streets!

Guided Reading Level O; Lexile measure 530; Ages 5-9
The Boxcar Children try to find the monster that lives in the mountain lake.

Guided Reading Level O; Lexile measure 510; Ages 5-9
The Aldens investigate a mystery involving a legendary mining expedition to the gold fields of Alaska.

Guided Reading Level O; Lexile measure 560; Ages 5-9
Someone has stolen the Aldens' boxcar! Can they get it back?

Guided Reading Level O; Lexile measure 650; Ages 5-9
Someone tries to steal a horse from the Morgans' farm.

Guided Reading Level O; Lexile measure 450; Ages 5-9
The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.