We all have books we love, but sometimes the concept can be hard to persuade our friends on. For one person, you may know a book you just read will be a slam dunk, but for one reason or another they don't want to try it. Other times, you know the trope or premise doesn't work for a fellow reader but you think the writing or characters will work.
Do you have a book like this? Why do you think you had trouble convincing them? Did you ever get them to read it?