The Bletchley Riddle
Ruta Sepetys
The Riddle (The Books of Pellinor #2)
Alison Croggon
The Riddle-Master of Hed (Riddle-Master, #1)
Patricia A. McKillip
Pandemic (The Extinction Files, #1)
A.G. Riddle
Winter World (The Long Winter, #1)
A.G. Riddle
The Atlantis Gene (The Origin Mystery, #1)
A.G. Riddle
Difficult Riddles For Smart Kids: 300 Difficult Riddles And Brain Teasers Families Will Love (Thinking Books for Kids Book 1)
M. Prefontaine
The Mysterious Benedict Society and the Riddle of Ages (The Mysterious Benedict Society, #4)
Trenton Lee Stewart
Riddle-Master (Riddle-Master, #1-3)
Patricia A. McKillip
The Shaking Palace (Magical Riddles, #1)
Raju Vashishta
The Lost Colony (The Long Winter, #3)
A.G. Riddle
LOL: Funny Jokes and Riddles for Kids (Laugh Out Loud Book 1)
Johnny B. Laughing
Genome (The Extinction Files, #2)
A.G. Riddle
The Solar War (The Long Winter, #2)
A.G. Riddle
The Riddle of the Labyrinth: The Quest to Crack an Ancient Code
Margalit Fox
Quantum Radio
A.G. Riddle
Heir of Sea and Fire (Riddle-Master, #2)
Patricia A. McKillip
The Extinction Trials
A.G. Riddle
Harpist in the Wind (Riddle-Master, #3)
Patricia A. McKillip