Here in Canada the book is called "The Philospher's Stone". I find it hard to imagine, but such modifications to imported media are common for the US market.

For example, Mordecai Richler's novel "Barney's Version" was issued in Canada and England with a picture of a Cuban cigar on the cover. The US edition was changed to a non-Communist brand of cigar.

In another case, the movie "Eyes Wide Shut" had scenes of male genitalia edited out for the US audience. After much ivory tower debate, Canadians were treated to the US version rather than the European.

M.