I'm planning on going to Japan soon and one of the things I'd like to do is buy a few books, but I want to get books that include the furigana for all the kanji. How would I ask a store associate to show me where I can find books that include that. My first thoughts go to 「ふりがなの本はありますか？」 but that kind of sounds like "Are there furigana books?" which I'm not sure conveys the correct meaning. Would I be asking that correctly if I said it that way or is there a better way of asking for books that include the furigana?

EDIT: I'm willing to accept a more generalized answer to the question of how to ask about something being included in something else if that makes sense.