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 Harry Potter Lexicon The Harry Potter Lexicon The Harry Potter Lexicon is a fan-created online encyclopedia of the "Harry Potter" series. The site was created by school librarian Steve Vander Ark. It contains detailed information for all seven published "Harry Potter" books. The Lexicon lists characters, places, creatures, spells, potions and magical devices, as well as analyzing magical theory and other details of the series. The Lexicon is credited as creating one of the first timelines of all events occurring in the "Harry Potter" universe. A similar timeline of events was adopted by Warner Bros. for inclusion with their "Harry Potter" film DVDs,