As all good fans know, most of the world uses the original title for book one . However, the U.S. fans know the book as Sorcerer's Stone.

Why was there a name change?

According to an interview, it was believed that U.S. readers would not understand the language or Concept of a mythical stone.

The philosopher's stone, a longtime "holy Grail" of Western alchemy, is a mythical substance that supposedly could turn inexpensive metals into gold; and/or also an elixir that would make humans immortal.

In modern times, Philosopher's Stone became a slang name for an hallucinogenic mushroom, Psilocybe mexicana, closely related to the more well-known Psilocybe cubensis.

I think that makes more sense than Sorcerer's Stone...