From Bulbapedia, the community-driven Pokémon encyclopedia.
The Scholastic Corporation is an American book publishing company. Currently based in New York City, the company was founded in Pennsylvania by Maurice R. Robinson in 1920. The name of the company reflects the original focus of the company: educational books. In recent years, they have expanded to carry other children's books, including the popular Harry Potter series.
For the Pokémon franchise, Scholastic publishes anime chapter books, the Official Pokémon Handbook series, and many other books relating to Pokémon.
List of Pokémon books published by Scholastic