Found 9 books 
![[Gutenberg 43135] • The Riddle of the Purple Emperor](/cover/b0j4KQGRjjDbQmz_/small/[Gutenberg%2043135]%20%e2%80%a2%20The%20Riddle%20of%20the%20Purple%20Emperor.jpg)
[en] [Gutenberg 43135] • The Riddle of the Purple Emperor Musaicum Books
![[Gutenberg 17180] • The Riddle of the Frozen Flame](/cover/zjFCivNA6uByvgTx/small/[Gutenberg%2017180]%20%e2%80%a2%20The%20Riddle%20of%20the%20Frozen%20Flame.jpg)
[en] [Gutenberg 17180] • The Riddle of the Frozen Flame Musaicum Books
![[Gutenberg 42802] • The Riddle of the Mysterious Light](/cover/f_JlDqaTwEqQXdD4/small/[Gutenberg%2042802]%20%e2%80%a2%20The%20Riddle%20of%20the%20Mysterious%20Light.jpg)
[en] [Gutenberg 42802] • The Riddle of the Mysterious Light Pearl Necklace Books
[it] La figlia del Califfo Polillo Editore
![[Gutenberg 32198] • Cleek of Scotland Yard: Detective Stories](/cover/x6glBxPQ7pUHwD89/small/[Gutenberg%2032198]%20%e2%80%a2%20Cleek%20of%20Scotland%20Yard:%20Detective%20Stories.jpg)
![[Gutenberg 14332] • Cleek: the Man of the Forty Faces](/cover/rsTBbaZTTwIamtyr/small/[Gutenberg%2014332]%20%e2%80%a2%20Cleek:%20the%20Man%20of%20the%20Forty%20Faces.jpg)
![[Gutenberg 28264] • Cleek, the Master Detective](/cover/TAhfKVKFC4BvIosN/small/[Gutenberg%2028264]%20%e2%80%a2%20Cleek,%20the%20Master%20Detective.jpg)
![[Gutenberg 33271] • The Riddle of the Night](/cover/-bJjnrr0NorYbnnu/small/[Gutenberg%2033271]%20%e2%80%a2%20The%20Riddle%20of%20the%20Night.jpg)
[en] [Gutenberg 33271] • The Riddle of the Night Createspace Independent Publishing Platform
![[Gutenberg 33279] • The Riddle of the Spinning Wheel](/cover/tfHq7Ed-l1-gGcq5/small/[Gutenberg%2033279]%20%e2%80%a2%20The%20Riddle%20of%20the%20Spinning%20Wheel.jpg)
[en] [Gutenberg 33279] • The Riddle of the Spinning Wheel Kessinger Publishing