The about page for Ask Different uses this question:
The problem is, the answer, as of a few months ago is YES. Apple released iBooks support in the newest version of OS X: Mavericks.
There is an answer on that page, by Jason S, which is correct, but it only has 2 upvotes and the accepted answer now has 18 upvotes. I think it'd be a good idea to change the question exampled there.
See also: my question on meta.SO about a bunch of /about problems.