title_body: Are there good book recommendation services?
upvoted_answer: What Should I Read Next is a decent service. It doesn't require an account, which is an added bonus. You simply type in a title or author and the service will recommend books by the author or similar to the title you entered. The links provided will point you to Amazon for further information, so it is not ebook specific (and may take a few manual steps to find it on ibooks).
  
  There is also this post that lists the top 10 book recommendation platforms (though it is a year old and includes the Sony Reader Store which no longer exists).