Yes, it's because publishers might only have rights to a given title in specific countries so Apple might have a deal with <Publisher-X> in the US and that publisher has the rights to <Book-Y> in the US so you get <Book-Y> on the US iBook store but in Canada the rights for <Book-Y> have been sold to another publisher (<Publisher-Z>) so unless Apple negotiate a deal with <Publisher-Z> in Canada then you won't get <Book-Y> on the Canadian iBook store. That's also why Apple try really hard to stop you buying <Book-Y> from the US iBook store because, by <Publisher-X> delivering the book to a Canadian customer, they have breached their agreement with the author of <Book-Y> who only licensed them the rights to sell the book for delivery in the US.
It really does suck. I've been reading ebooks for 11 years and, because I started on Palm devices, I've bought most of my content from Fictionwise (now part of Barnes & Noble). The situation there has got worse and worse with more and more of their titles being US only so I've jumped ship. I could have gone to Kindle because that definitely has the biggest range of books in the UK right now but I've taken a leap of faith and decided to run with Apple for a while. I'm really hoping that Apple are a big enough company, with enough of their revenue from non-US markets, that they will take the international view and make the effort to sign up non-US rights holders whereas someone like Barnes & Noble just don't seem to be bothered.
Apple's huge resources and their existing experience with iTunes must put them in a good position since populating the iTunes store is all about signing up with the rights holders for copyrighted material on an international basis and they've shown themselves to be pretty good at that when the source material is music so I'm hoping that they can transfer their expertise to eBooks.
Right now the end result is poor, the iBooks store in the UK has pretty limited content compared to Kindle, but it's only been live for just over 2 months in the UK and only about 3.5 months in the US whereas Kindle is almost 3 years old in the US and 9 months old in the UK (I think) so I'm willing to give Apple a bit more time to sign up content. I'll start judging them seriously at the end of this year.
- Julian