Ten mysteries for ten-year-old Encyclopedia Brown, his partner, Sally, and the reader to solve. Solutions are given at the back of the book.

With a knack for trivia, Encyclopedia solves mysteries for the neighborhood kids through his detective agency. But his dad is also the chief of police, and every night, Encyclopedia helps him solve his most baffling crimes. Join Encyclopedia Brown as he solves ten confounding mysteries, from recovering a client's prized tooth collection to following a trail of paint to find a sneaky thief, and more. And with the clues given in each case, readers will...

The Alden children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.

"The Alden children discover clues that could help them figure out why a man vanished from a run-down yellow house on Surprise Island"--

Ten brief cases in which the reader must pit his wits against those of Encyclopedia Brown, an ingenious twelve-year-old detective.

"Amateur sleuths Frank and Joe Hardy investigate a counterfeit operation while their detective father is connected to a secret case involving national security. An old mill on the outskirts of town appears to hold the key to solving both crimes"-- "Amateur sleuths Frank and Joe Hardy investigate a counterfeit operation while their detective father is connected to a secret case involving national security. An old mill on the outskirts of town appears...

The Alden children investigate various mix-ups at a zoo run by their grandfather's friend in an effort to save it not only from pranksters but also from the town council.

Ten brief cases allow the reader to match wits with ten-year-old crime-buster, Encyclopedia Brown, as he investigates such cases as whether a diary of George Washington's mother is authentic, or if a UFO picture supposedly taken by the army is real.

The Boxcar children uncover a mystery on a train trip from Boston to San Francisco.

The Alden children save an old woman's house, land, and all the animals in her animal shelter from greedy contractors.