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Cover for Matt Mayfield · Lair of the Sphinx (Pocketbok) (2017)

Lair of the Sphinx (2017)

Cover for Rick Smith · Tower of the Riddle Master (Pocketbok) (2017)

Tower of the Riddle Master (2017)

Cover for Matt Mayfield · Shadowman's Twisted Treasury (Pocketbok) (2021)

Shadowman's Twisted Treasury (2021)

Cover for Matt Mayfield · Quest for the Riddle Stone (Pocketbok) (2017)

Quest for the Riddle Stone (2017)

Cover for Rick Smith; Matt Mayfield · Riddle of the Unicorn (Pocketbok) (2017)

Riddle of the Unicorn (2017)

Rick Smith; Matt Mayfield

Cover for Matt Mayfield · Shadowman's Tricks & Traps (Pocketbok) (2008)

Shadowman's Tricks & Traps (2008)

Cover for Doug Carr · Indy 2008 Riddle Book (Pocketbok) (2008)

Indy 2008 Riddle Book (2008)

Cover for Matt Mayfield · Indy 2009 Riddle Book (Pocketbok) (2009)

Indy 2009 Riddle Book (2009)

Cover for Robin Marks · Riddles in a Language Arts Classroom (Pocketbok) (2011)

Riddles in a Language Arts Class... (2011)

Cover for Rick Smith · Indy 2010 Riddle Book (Pocketbok) (2010)

Indy 2010 Riddle Book (2010)

Cover for Matt Mayfield · Indy 2011 Riddle Book (Pocketbok) (2011)

Indy 2011 Riddle Book (2011)

Cover for Matt Mayfield · Solve the Riddle!: The Combined Indy Riddle Books 2005-2011 (Pocketbok) (2020)

Solve the Riddle!: The Combined ... (2020)

Cover for Matt Mayfield · Cryptic Word Searches #2 (Pocketbok) (2020)

Cryptic Word Searches #2 (2020)