If you’re looking for a good book about ancient Egyptian religion, you should pick up Daily Life of the Egyptian Gods by Dimitri Meeks and Christine Favard-Meeks. It’s not new, but I hadn’t gotten around to reading it until now. And I’m sure glad I did: it’s probably one of the best general reference books I’ve ever read.
Originally published in French, the book treats the Egyptian gods as if they were an ethnic group being studied by anthropologists. At first, I thought that sounded like a gimmick, but it’s a surprisingly effective approach. But where the book really shines is its use of primary sources. The authors draw upon some very obscure texts, which allows them to provide a level of detail that you rarely see in general reference works. Unfortunately, many of these texts are only available as hard-to-find French translations, so accessing them can be almost impossible unless you can consult a dedicated Egyptological collection and are reasonably proficient at reading French. But thanks to this book, the general English-speaking public can at least get a glimpse of them.
Codex Lochianus 