From Bulbapedia, the community-driven Pokémon encyclopedia.
The Dragon & Poison Pokédex is a book that was published by Scholastic and written by Katherine Noll. It is the sixth book in the series of the Element Pokédex.
The cover of the book, like the other books in its series, features a Poké Ball, specifically the Timer Ball. It is 47 pages in length.
The book features information on 13 Dragon-type and 42 Poison-type Pokémon. It also includes tips for battling with an against Poison and Dragon types, additional stats for Poison dual types, and information on Agatha and Koga, who both use Poison-type Pokémon.