Kind of wonderful but also kind of not quite what works for me. I adored the concept, and the writing is adequate. Lots of potential tension between the two antagonists, as there are no real good guys here, only close friends who become rivals who spiral into bitter enemies many years later. Good characters, lots of interesting and varied backstory... 
 The one flaw that killed a lot of the tension? The way the story jumped backwards and forwards in time with every chapter. Which in of itself is not a problem...except that some of the chapters were only a couple pages long. With so many short chapters, I can barely rev up before it cuts off and skips to a different point in time. That chipped away the tension I might have otherwise felt, but I am aware that is also a personal preference as well. I can see this story as a VERY successful TV show or movie...