Stumbled on this while browsing strategy guides. Seems like a right bargain to me. Went hot for over £15 last month. I already own the original collector's edition guide, but couldn't say no at this price.
Free delivery on Prime or with orders of atleast £10 of books (buy two, sell one?)
It's over 800 pages and includes a walkthrough for all quests in the game (including DLC).