Harry Potter Trading Card Game these expansions include the addition of the "Quidditch" lesson type and "Match" cards introduced in the "Quidditch Cup" expansion, location cards introduced in the "Diagon Alley" expansion, and a larger pool of adventure cards in the "Adventures at Hogwarts" expansion. The fourth and final expansion released was "Chamber of Secrets", which has 140 cards plus 55 Foil or Hologram Portrait Premium rares (October 2002). This last expansion features cards based on the "Chamber of Secrets" book, where all previous cards were based on the "Sorcerer's Stone" book. From its conception in 2001 through 2003, the "Harry Potter Trading Card Game"
The Books of Magic began publishing a series of "Books of Magic" young adult novels under the Eos imprint, adapted from the comics series, by Carla Jablonski. Each novel featured cover art by Christopher Moeller. The first book is based on the original miniseries. The subsequent books are based on story arcs in the second series; except "The Children's Crusade", which is based on the Vertigo crossover event of the same name. A film version of "The Books of Magic" has been in development hell for many years. It was originally optioned "by Warners some years before the first Harry Potter book was published"