Alexander Russo puts things into perspective: "Still trying to digest Apple's recently-announced foray into the textbook market? The education textbook business is big, notes Wired -- much bigger than most people understand. The biggest education publishers in the world -- Pearson, Reed Elsevier, Houghton Mifflin Harcourt, Thomson Reuters -- are most of them much bigger than the better-known book publishers like Random House or Penguin (owned by Pearson). They're bigger than AOL or the New York Times company. Only multi-platform companies like News Corp and Amazon have bigger revenue or profits, according to the piece. Scholastic, which sponsors this blog, comes in at number 10. "