Sceptical at first, I'm glad I kept on going with this one.
It has a strange set up; about the first 300 pages are foundation and then everything suddenly happens at the end. I got a little confused at times, but I suppose that is the nature of stories that contain time travel in the way this one does.
The exploration of deities and earth magic is just wonderful, especially if you're a massive nerd for that sort of thing. It pieces itself together and really makes you think about the ancient past, and beliefs that we dismiss now, but who are we to do so? What lies beyond our reach? As imperfect as the book is in places, such as the letters (which, though dry at times, were still interesting to me) it far makes up for it with the Elder Time and the vivid ending.