Coming fall 2018..... You can preorder it for 25$. edit: Honestly, my thoughts on this is that I rather have a big book/complete edition of all the compiled grimoire than a volume 1 book!
[i]I've never really dove head first into the lore of this game, but always found tid bits extremely interesting. I've never bought anything from the Bungie store nor silver in game. This book, has me intrigued though.[/i] [spoiler]Needing someone to pay me for 4 WotW runs so I can afford it.[/spoiler]