This book really is the ultimate reference book for those that want to remember or learn what has happened in the NFL since the AFL & NFL merged completely at the start of the 1970 season. It is illustrated using the helmets teams wore over the course of every regular season game. It is geared to the fan  of every single one of the 32 clubs! 2017 will be an epic year for many reasons and this book will help you enjoy it more.