Gintama Anime Iroiro Life

The fourth official animation guide authored by Hideaki Sorachi, Gintama Anime Iroiro Life features all kinds of interesting stuff, including an anime guide with 40 characters with messages from the cast, Q&As with 20 main cast members, a season three episode guide explained by the producers, and a synopsis of season three including the Shogun Assassination arc and the Farewell Shinsengumi arc.
The book comes in B6 size and spans 227 pages, and it comes with some cool bonuses including stickers and two near life-sized posters, so now you can do an actual staring contest with your favorite characters on the wall~