Spread Certificate · No. HIS-01278
This certifies how far it spread
Harry Potter and the Philosopher's Stone
J.K. Rowling; Bloomsbury (UK publisher); Scholastic (US publisher) ·June 1997 ·seeded onRetailthenPressOpen webAudio
Spread Score
38
Niche
Verified independently
Verified
#1
NYT hardcover fiction rank reported by TIME
TIME
Verified
4 outlets
National press, from The New York Times and TIME
Verified
Sep 1999
Milestone date, Jun 26 ’97 to Sep 1999
Verified
4 platforms
Started on Retail
Claimed, not audited
Claimed
3.4M sold
US paperback sales during 2000, publisher-supplied
Per Publishers Weekly
Claimed
$105K
US publishing rights, reported auction price
Per The New York Times
Claimed
3.2M sold
US paperback sales during 1999, publisher-supplied
Per Publishers Weekly