Star Wars Rogue One: The Ultimate Visual Guide was written by Pablo Hidalgo with illustrations by Kemp Remillard and a foreword by John Knoll, the Executive Producer & Visual Effects Supervisor for Rogue One. The book was released by DK Publishing.
In the Forward, John Knoll expresses his praise for Star Wars, released in 1977. He was amazed at the design and high quality execution of the film. He admits that the film is what set him on the path to a career in entertainment. 
Rogue One was an epic film! I could even argue that the novelization by Alexander Freed was even better! I have enjoyed all the extra material that surrounds Rogue One and can’t wait for more stories focused on the new characters we were introduced to.
This visual guide is pretty much an encyclopedia for the film. It has so much detail about every little thing. First thing I’d like to mention, is that it has the updated galaxy map with all the new planets from the film. I love maps, and it excites me that these books are staying up to date with the films.
On characters, we get some awesome details about the characters seen in Rogue One. One of my favorites is Admerial Raddus – we get to know more about where he came from, his personality, even his height! There is so much information with photos of characters I didn’t even notice in the film! The Death Troopers are intimidating warriors, we get close up visuals of the weaponry and armor with information on what the equipment is capable of. 
This book is loaded with cool stuff! If you love Rogue One like I do, or just have to have all the details on pretty much every character that man an apperance in the film… get this book.