The town's ten-year-old walking encyclopedia again solves ten neighborhood mysteries. The final solutions to the cases are at the back of the book, giving the reader a chance to compare his skill to that of Encyclopedia Brown.

Nate the Great investigates the disappearance of a homemade pillowcase belonging to Rosamond's cat Big Hex.

The solutions to 10 mysteries solved by Leroy "Encyclopedia" Brown are given in a separate section challenging the reader to match wits with the 10-year-old mastermind of Idaville's war on crime.

An archaeological expedition in the West turns into a desperate attempt to capture robbers and an escaped convict.

"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, including a case of a kidnapped millionaire, a dangerous dog and his mean owner, a famous big-town crook, and more. And with the clues given in each case, readers...

The Hardy boys and two friends take a camping trip to the Rocky Mountains in an attempt to locate a gang of credit-card counterfeiters.

The Hardy brothers embark on a freighter trip under mysterious circumstances and find themselves involved with a smuggling ring.

The mysterious death of an eccentric millionaire brings together an unlikely assortment of heirs who must uncover the circumstances of his death before they can claim their inheritance.

A hard-bitten former search-and-rescue dog helps solve a complicated missing chicken case.