I'd like to say thanks for putting out books to flesh out the lore, alongside the short stories/comics you've made available. I believe it really adds a new dimension to any universe and allows us to further dive into principles, characters, events and ideas we discover in the games and other media.
EDIT: I've mostly read and enjoyed Warcraft lore previously, am looking to get into more Diablo lore and may start with this. Not actually commenting on the content of the book as I haven't read it yet. :P