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.

There are many iterations of Sherlock Holmes in popular culture, so it's important to go back to the source to find out why people have long been inspired by this ingenious character. This winning graphic novel is a faithful retelling of Arthur Conan Doyle's terrifying tale, which is one of the toughest mysteries to challenge his unique detective. Doyle's exceptional story is paired with thrilling illustrations by renowned graphic artist Anthony Williams....

Frank and Joe Hardy receive an unusual assignment from their detective father. They are to "break into" the house of a Bayport neighbor, Malcolm Wright and retrieve a top-secret invention that the scientist had hidden in his study before leaving for California. The invention is in danger of being stolen and the boys race against time to beat the thieves at their own game. The young detectives soon discover that they are involved in a mystery far

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The eighteen-year-old girl detective must find a man who has been missing for years in order to locate the other half of a treasure map.

The Hardy brothers interrupt their investigations of jewelry-store holdups to answer a plea from their cousin on a New Mexico cattle ranch.

Someone is trying to put Aunt Jane's motel out of business, but the Alden children aren't going to let that happen.

Someone is stealing brownies from Mike and Mary£s sandwich shop. Jigsaw is piecing together the clues one crumb at a time. But no one is going to snatch a brownie while a detective is watching. Time for Jigsaw to go undercover and catch this brownie bandit.

After her vacation cottage is ransacked, Nancy discovers the popular tourist retreat she is staying at is a hotbed of deception and crime. Her investigation leads her to a labyrinth of caves where--according to rumor--a treasure of gold is hidden. But someone wants the truth behind the legend to stay buried forever, and the deeper Nancy digs, the more perilous her search becomes.