Not a book I can imagine having broad appeal. I'm an Ehrman fan, I think he does an amazing job of explaining the science of the history of the bible. And I also enjoy reading about ecclesiastical history. This book follows the progression of the idea of Jesus over time, from the earliest believers who called him teacher and knew him as a fairly normal apocalyptic preacher through the early years of Christianity and into orthodoxies and heresies, ending with the creed that Jesus is both fully human (and thus, mortal) and also fully God (and thus, immortal) at the SAME TIME. If you aren't especially interested in the minutia of religious debate and/or the politics involved in choosing which beliefs to incorporate and which to denounce, then this isn't for you. All of Ehrman's books are excellent, mind, I'm just saying some have greater mass appeal (heh).
This is another one of the spring break books that Veronica and I ended up sharing, because not enough strength to carry all the books one wants to read over a few days.