Just picked up a copy of the new book "Angels Essential" by Steven Travers. Maybe you already know this Rev, but he thanks Halos Heaven in the Acknowledgements section at the beginning. PANTHAH.
As fas as the book itself, I'm almost done with it and it's pretty good. Lots of cool stuff on Bo Belinsky, but many other Angel greats get kind of glossed over. It also has a pretty religious bent to it, but not so much that an atheist like me is rolling his eyes.
One thing that did bug me about it is that the subtitle is "Everything You Need to be a Real Fan." As if the book is reserved for bandwagoneers or something.