When they journey to Alaska to help a friend who feels his life is in danger, the Hardy brothers find their own lives threatened.

Nancy and her friends help a woman search for her missing grandson.

When she notices some bones missing from a dinosaur skeleton exhibited in the museum, a young girl with a photographic memory tries to discover who has been taking them and why.

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

An unexpected midnight guest, a holdup at the First City Bank, a stolen tennis racket, gerbils who paint in pairs, and fifty mosquitoes netted at the Oddball Olympics--just some of the ten mysteries that Encyclopedia Brown must solve.

Dink, Josh, and Ruth Rose investigate a mysterious man in black who Josh believes is a vampire.

New York Times Bestseller: The murder of the secretary of state in the executive mansion sparks a mystery with “a superb denouement” (Time).
 
In a city where the weapon of choice is usually gossip, the strangling of Secretary of State Lansard Blaine in the Lincoln Bedroom is a gruesome first. White House counsel Ron Fairbanks is ordered to investigate. There are persistent rumors that the secretary...

Also published by Puffin Books, 2002. Cam uses her photographic memory to find a shopping list that her dad lost at the library.

The Hardy boys and their father solve a mystery involving inexplicable crashes of highspeed race cars being used to test an experimental turbine motor.

Asked to locate a stolen necklace of unusual value, Nancy soon discovers that strange and dangerous people are responsible for the theft.