The highly-anticipated Book 2 of the #1 bestselling The 39 Clues series.

THIS JUST IN! Amy and Dan Cahill were spotted on a train, hot on the trail of one of 39 Clues hidden around the world. BUT WAIT! Police report a break-in at an elite hotel, and the suspects ALSO sound suspiciously like Amy and Dan. UPDATE! Amy and Dan have been seen in a car . . . no, in a speedboat chase . . . and HOLD EVERYTHING! They're being chased by an angry mob?!?...

The search for missing gold takes the Hardy boys to the Yucatán Peninsula where they uncover a second mystery.

Ten-year-old Cam, possessor of a photographic memory, and her friend Eric investigate what seems to be a brief appearance of U.F.O.s.

Two teenage sleuths help their detective father search for a famous rocket scientist whose disappearance endangers the launching of the Firebird Rocket.

Forensic evidence leads to places a Scottish cop never expected in “a thriller as steely and superlative as its heroine” (O, The Oprah Magazine).
When a teenage joyrider crashes a stolen car and ends up in a coma, a routine DNA test reveals a connection to an unsolved murder from twenty-two years before. Finding the answer to the cold case should be straightforward. But it’s as twisted as the DNA helix itself....

Frank and Joe Hardy become involved in a mystery after the theft of a hot rod belonging to their friend, Chet.

Wilma Tenderfoot, a ten-year-old orphan who lives at Cooper Island's Lowside Institute for Woeful Children, dreams of escape and of becoming the apprentice of the world-famous detective Theodore P. Goodman, whose every case she follows devotedly in the newspaper.

The Thea Sisters are going to Milan for a ballet competition and to keep the contest legal.

Violet and Jessie begin an adventure when they journey to Centerville to keep Aunt Jane company on the family ranch.

Arnie the talking doughnut is delighted to be Mr. Bing's new pet "doughnut-dog," so when Mr. Bing starts rolling gutter balls during a big bowling tournament, Arnie suspects foul play and sets out to solve the mystery.