From The Australian:
[The convenience of e-textbooks] doesn’t mean Apple’s introduction of tools to spur e-textbook development will translate into a flood of iPad sales, which is how the company would make money.
One problem is the supply of e-textbooks. Apple’s iTunes Store has only a handful available to start. And publishers may limit future supply considering that Apple insists that they charge just $14.99 for each e-textbook, far cheaper than today’s prices. Even if lower prices discourage used-book sales, allowing publishers to sell more copies, Apple’s low price could still eat into total revenue.
. . . .
[T]he real winner may be Amazon, whose Kindle Fire tablet costs 60 per cent less than an iPad 2. There are already far more textbook titles available for the Fire, direct from Amazon or through publisher-supported start-up CourseSmart.
Link to the rest at The Australian (sometimes PG gets a login page at the link, but other times, he goes to the full article)