"It still says: "iBooks uses the ePub file format"" That statement is as accurate as it's ever been. iBooks uses the ePub file format. You have also been a

"It still says: "iBooks uses the ePub file format"" That statement is as accurate as it's ever been. iBooks uses the ePub file format. You have also been able to do PDFs since forever. Starting last week it also supports .IBA (?) files made from iBooks Author.