Apple has an upcoming event focused on education. In addition to speculation about lower priced hardware suited to the education market, there was mention of an upgrade to iBooks
The last time Apple held an education event, it was to announce iBooks 2 and a new iBooks Author app in 2012 to make it easier to create textbooks. It stands to reason that Apple could announce updates to its bookstore at this event too. Plus, Apple is also already said to be working on an overhauled iBooks app, according to a report from Bloomberg, which adds credence to the possibility.
I have always thought that iBooks Author was a great platform for ebook authors, but I have focused on writing for the Amazon because Apple assumes authors will write for Apple devices only. I just don’t see the iBook getting much traction as long as it is unavailable to those who prefer to read on non-Apple hardware. To this point, this is how Amazon has dominated this market.