In reading order
Sammy Keyes and the Hotel Thief
Wendelin Van Draanen
Sammy Keyes and the Skeleton Man
Wendelin Van Draanen
Sammy Keyes and the Sisters of Mercy
Wendelin Van Draanen
Sammy Keyes and the Runaway Elf
Wendelin Van Draanen
Sammy Keyes and the Curse of Moustache Mary
Wendelin Van Draanen
Sammy Keyes and the Search for Snake Eyes
Wendelin Van Draanen
Sammy Keyes and the Dead Giveaway
Wendelin Van Draanen
Sammy Keyes and the Wild Things
Wendelin Van Draanen
Sammy Keyes and the Cold Hard Cash
Wendelin Van Draanen
Sammy Keyes and the Wedding Crasher
Wendelin Van Draanen
Sammy Keyes and the Night of Skulls
Wendelin Van Draanen
Sammy Keyes and the Power of Justice Jack
Wendelin Van Draanen
Sammy Keyes and the Showdown in Sin City
Wendelin Van Draanen
Sammy Keyes and the Killer Cruise
Wendelin Van Draanen
Sammy Keyes and the Kiss Goodbye
Wendelin Van Draanen