The Maze of Bones
Rick Riordan
39 Clues (1)
Vigorish
Randall Garrett
An Imperceptible Ruse Indeed
A. L. Bridges
The God's Executioner (5)
Counterfeit for Murder
Rex Stout
Nero Wolfe (54)
If at Faust You Don't Succeed
Roger Zelazny & Robert Sheckley