The Dark Tower series by Stephen King has eight volumes, most of them with turtle elements. In the first two we did not find any, in the third one we did. More info to come:
I: The Gunslinger
II: The Drawing of the Three
III: The Waste Lands
IV: Wizard and Glass
V: Wolves of the Calla
VI: Song of Susannah
VII: The Dark Tower
VIII: The Wind Through the Keyhole
