I'm not really sure what to say about this right now that hasn't already been said, but I'm pretty well incoherent with rage, especially because one of the affected authors is my Human Behavior professor.
Apparently, Amazon.com believes that books with LGBTQ content - even at the level of Heather Has Two Mommies
- are "adult materials"
and thus should not be counted in sales rank.
A list of affected works is being maintained over here.
Oh! I do know what to say! Someone ought to tell the people who made this policy that Albus Dumbledore is gay, and therefore the entire Harry Potter series should be seen as "adult materials" under this new policy.