Yes, they should. I was just checking the book description out. Lol. I clicked on Apple and it took me straight to the book, in the store. I like how you can get samples before buying the books. With some I like to make sure I'm interested before purchase.
I have the Nook app, because I had it before all the readers were out and it was the one which worked on my then-blackberry. I love it because you just have to sign your account up then your books are always available on any device you want to use. There are free books available on that, too.
As long as you're not buying an eReader device, there are lots of free apps you can use and I think most work well.
The pews never miss a sermon but that doesn't get them one step closer to Heaven.