I am taking this book as a working lesson in what can result when an inexperienced, mediocre writer bites off more than he can chew with a story idea. The idea itself (while flawed in its own ways) could work better in the hands of a more talented writer, but that writer would take the time to develop the characters and settings, not content himself with cardboard cutouts whose motives and inner journeys he doesn't sell, or skip over hundreds of details with brief exposition or missing scenes, and he'd take the time to breathe life into his prose.
I can't claim that if this were my series, I'd do a better job, but I know this: books 1 and 2 would make more sense if the same material were given the space they needed to do all of the above--say, four books, and my readers wouldn't have to reread the same passages repeatedly to figure out what happened, what something meant, or to convince themselves no explanation was offered.
Audiobook addendum: the execution of the story is made worse by the sometimes childish, sometimes wooden narration of the reader. Cringeworthy.