Darren G. Davis 
Wrath of the Titans: Revenge of Medusa #2 [EPUB ebook] 

As Argos teeters on the edge of destruction, Perseus is confronted with a monstrous challenge… defeat the Minotaur. Locked in the inescapable labyrinth, Perseus is not only tested physically, but must face down personal demons as well as the sisters of his old nemesis Medusa make their move. This second chapter of the follow-up to the sword-and-sandals epic book ‘Wrath of the Titans’ will keep you guessing.