Dahlia I don't really know how to answer that because people have very different standards, but this book is for 14+, and I'd say that's exactly right for readership. It definitely doesn't have graphic on-page sexual content; I saved that for...well, all my other books, I suppose.
Madi ~☆TheBookNerdDiaries☆~ The author does mention some stuff that is not for kids. I would read the Amazon sample first as the author mentions something withing the first few pages. If you don't catch the somewhat mature reference, I would say you are fine. If you catch it and are not okay with that, I would be weary of this book.