Not a bad book, but...
...there were some things that really annoyed me when I was reading it.
First were the choppy sentences. Instead of writing with fluidity, the author chose to break sentences apart making them clipped. That can really mess with the flow of a story. The second is the off/on use of pronouns. Another was the cliched and unrealistic dialogue. Here's an example that incorporates all three:
"The ascetic caught Michael's fist an inch in front of his face. He squeezed Michael's hand until the old man writhed in pain. "I may look slow and weak to you humans, but my physiology makes me superior in every way." With his free hand, the acetic pushed Michael, sending him across the floor. The ascetic walked out the door, leaving Michael to tend to his pain. Michael lay on the ground, trying to catch his breath. Michael stayed there for several minutes..."
The story had great potential and if the dialogue and other shortcomings mentioned above were corrected, this could easily be a four- or five-star book.