When competition for lucrative prizes ranging from money to placement on the Olympic Team escalates to the point where one desperate participant drugs horses at the River Heights Horse Show, Nancy, Bess, and George track clues to identify the culprit.

Fifth-grader Cam uses her photographic memory, with help from her friend Eric and his twin sisters, to solve the mystery of Poochie, a famous canine television star.

"Doug Weaver is a defense attorney who always believes the best of his clients, and Jacob Cohen, on trial for murder, is no exception. Jacob may be homeless and mentally ill, but Doug can't imagine that this meek and intensely religious man could have killed and dismembered a woman. Yet Bernard Cashman, a forensic expert at the Oregon State Crime Lab, finds evidence that indisputably connects Cohen with the crime." "Frustrated and confused, Doug consults...

As more and more of his flowers display the bite marks of a wandering tortoise, Nate sets out to uncover the mystery of the reptile's origins.

Challenges readers to solve ten mysteries using the same clues as the ten-year-old detective Encyclopedia Brown, with answers given in a separate section.

Fifth-grader "Encyclopedia" Leroy Brown solves ten mysteries and, by putting the solutions at the back of the book, challenges the reader to do the same.

Superintendent Richard Jury has been wrong before. But when stating that nothing ever happens in Stratford, he doesn't imagine just how wrong he can be. Besides the stage murders performed at the Royal Shakespeare Theatre, a real one has been committed not far from a popular pub know as the Dirty Duck. And the killer has left behind a fragment of Elizabethan verse - a rhyme that could mean death with each new line...

"After investigating a series of pranks, Frank and Joe uncover evidence of the Red Arrow, a group that will stop at nothing to bring chaos and crime to Bayport."--

A fifth-grader uses her photographic memory, her mother, and her friend Eric to find a missing reel of a monster film they go to see.

The Hardy boys go to the Pocono Mountains to help a friend of their father find out what is behind the mysterious happenings at Black Hollow. In the process they help their father solve a case involving a ring of thieves.