Thanks for weighing in! I understand at this point that the books definitive gender statement is "angels are sexless unless they really want to make an effort", does that sound like correct canon to you or is it less specific/more word-of-god than that?

It would be helpful to know what you think the differences are between the book and show. I've done some googling, and the stance from the creators and many viewers appears to lean more heavily towards it being the same - just that tv shows focuses on or elaborates on slightly different things at some points. Does that sound incorrect to you? Are there canon contradictions between them that you're aware of and think we should consider?