I’m frustrated

Missing Manuals in iBooks

My Missing manuals used to show up on my iPad & iPhone under previous iOS 6 & before. The ones i loaded before still do but my new purchase iPhone 7th edn. (epub) does not appear in iBooks iOS7. I have checked all the settings and can find no reason why not... Help!
I am using the latest version of Mavericks & iTunes on my Mac.
Could it be because I bought it through you and not from the iTunes store? Are Apple being mean :(
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