1. Actually the word "Heaven" is not used.
2. The realms of Set and Sekolah are mentioned, the first gets like three paragraphs, the second one and a half.
(Seeing your reaction, I maybe should stop posting about the book, or WotC will sue me for destroying their sales
More seriously, I might get some details wrong when I summarize parts of the book, english is not my native languague. So best reverse final judgement till you see it yourself.)
2. The realms of Set and Sekolah are mentioned, the first gets like three paragraphs, the second one and a half.
(Seeing your reaction, I maybe should stop posting about the book, or WotC will sue me for destroying their sales
