Mystery of the Empty House
by Dorothy Sterling | 
The Tattooed Potato and Other Clues
by Ellen Raskin | 
The Bobbsey Twins of Lakeport
by Laura Lee Hope | 
Clues in the Woods
by Peggy Parish | 
Key to the Treasure
by Peggy Parish | 
The Treasure of Alpheus Winterborn
by John Bellairs | 
The Long Secret
by Louise Fitzhugh |
Tunnel Vision
by Aric Davis | 
Half Moon Investigations
by Eoin Colfer | 
Goody Hall
by Natalie Babbitt | 
The Secret of Terror Castle
by Robert Arthur | 
The Famous Stanley Kidnapping Case
by Zilpha Keatley Snyder | 
The Secret of Skeleton Island
by Robert Arthur | 
Sammy Keyes and the Search for Snake Eyes
by Wendelin Van Draanen |
Nooks & Crannies
by Jessica Lawson |
The Next Great Paulie Fink
by Ali Benjamin |
The Big Splash
by Jack D. Ferraiolo | 
Mudshark
by Gary Paulsen | 
Figgs & Phantoms
by Ellen Raskin | 
The Westing Game
by Ellen Raskin |
When Mrs. Leon Carillon sets off to meet the husband she hasn't seen since he was five, she doesn't know what to expect. She certainly doesn't bargain for the storm that knocks their boat overboard, or the fact that her husband will disappear, leaving only one very watterlogged clue. She also doesn't know that while she searches for Leon (or is it Noel?) she will have to find the answer to these important questions: Were Tony and Tina really Siamese Twins? Why does the crossword puzzle expert wear a helmet during dinner? And what do the glub blubs mean?