"The 4th Catalog of the Yu-Gi-Oh! Card Game: Duel Monsters, has appeared! It covers the 500+ cards released in 2001. With complete explanations of the New Expert Rules and a manual on Deck Construction, you'll have everything to master Dueling with this one book!"
Official Card Catalog: The Valuable Book 4 (公式カードカタログ ザ・ヴァリュアブル・ブック ４, Kōshiki Kādo Katarogu: Za Varyuaburu Bukku 4), commonly known as The Valuable Book 4, is the fourth book in The Valuable Book price catalog series. It was published by Shueisha on January 25, 2002, and covers the 500+ cards released in 2001, the New Expert Rules, and a Deck construction manual.