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

Storm clouds gather on the horizon for the people of Argos. Their newborn prince, the son of Perseus, was stolen right out of his cradle. Perseus has fought many mythic monsters but never absorbed such a painful blow. Summoning all his strength and cunning, he goes out in search of his first-born and heir. This brings him back into the murky world of the three hags who possess the key that will help Perseus find his son. But information comes at a dangerous price: acquire the Horn of the Cyclops. As dangerous as this task is, Perseus is unaware of the mounting peril that seems intent on stopping him.