Dink Duncan and his two friends investigate the apparent kidnapping of famous mystery author Wallis Wallace.

"Twelve-year-old Truly Lovejoy's family moves to a small town to take over a bookstore. Soon, she has to solve two mysteries involving a missing book and an undelivered letter"-- Provided by publisher.

Third grader and inventor extraordinaire Ada Lace has a new social studies teacher--who loves group projects. While most of the class has constructed regular dioramas with clay and construction paper, Ada, her best friend Nina, and sometimes nemesis Milton have built a complex scale model of an h...

Third grader and inventor extraordinaire Ada Lace is on spring break. But it's just a little less relaxing than she'd imagined. Nina is beside herself with excitement about meeting her favorite artist and enlists Ada and Mr. Peebles's coding-whiz nephew to help revamp her online portfolio.

Ada Lace--third-grade scientist and inventor extraordinaire--has discovered something awful: her neighbor's beloved Yorkie has been dognapped!

Ada Lace is building a new robot! She's determined to beat Milton in the upcoming robotics competition. But she's distracted--Ada finds her dad's art class impossible, while Nina is the star of the class, basking in the glory of being Mr. Lace's star pupil.

"Third grader and inventor extraordinaire Ada Lace likes nothing more than to tinker with mechanics like her robot, George. Her latest project is to fix up a ham radio, something that she could use to contact people on this planet ... and beyond. The only problem is that she just can't get it to ...

Amateur detective Sherlock Holmes, the master of deductive reasoning, solves several mysteries with the aid of his friend, Dr. John Watson.

Sleuthing duo Emily and James tackle their most challenging mystery yet set on the haunting Alcatraz Island in Book 3 of the New York Times bestselling Book Scavenger series!Legendary literary game-maker Garrison Griswold is back in action—this time with "Unlock the Rock." For his latest game, Gr...