Apple's free iBooks Author is an easy way to get started in electronic textbook publishing. Just know there's a middleman standing between you and your adoring public: Apple. Read more about Apple's tricky software license agreement, which as InformationWeek
's Thomas Claburn points out, puts severe restrictions on authors' rights.
BYTE's Chris Spera has his own opinion about Apple's moves in the textbook market.
Publishing through Apple's iBookstore requires an iTunes Connect account. Separate account types can be created for publishing free and paid ebooks.