That’s what I do. I think Apple got wise to it though, so they started putting ads directly on the main screen of the app now. Seriously, I open the books app one day and have a topless Britney Spears staring at me. A pretty jarring experience, had to block books.apple.com on my network to get rid of the ads.

i do that and i use spoken content. that way the iphone reads the book to me.