A Game of Thrones Unofficial Transition Guide

This book is intended to help someone who has seen the first five seasons of Game of Thrones begin reading George R. R. Martins’ sixth book when it comes out. This book will allow you to understand the continuity of the sixth book while only having watched the first five seasons.
The purpose of this book is to show the major differences in plot and characters. It is not to show every difference or extra plot line between the series and books, but the major ones that are crucial to understand the newest book.
Get all the differences from main characters like Tyrion Lannister, Daenerys Targaryen, and Catelyn Stark. Also get information about characters not in the show.