Assassin's Creed Origins: Official Game Guide

Assassin's Creed Origins: Official Game Guide is an upcoming 320 paged book, which wwill be released alongside Assassin's Creed: Origins on October 27, 2017.

It will tells mostly everything about Assassin's Creed: Origins, including a walkthrough of all the sequences in the game, along with help with controls, side quests and a detailed analysis of all things inside the game.

Collector's Edition
Contain an extra 20-page art gallery which the regular version lacks. It includes detailed maps, including one as a wall poster.

Reference

 * Amazon: Assassin's Creed Origins: Prima Official Guide
 * Amazon: Assassin's Creed Origins: Prima Collector's Edition Guide