2.5 stars. I wanted to give two stars, because I felt the book to lack substance. But I enjoyed it more than I initially expected, so I rounded up instead of down. I quite liked the idea at the heart of this book, but everything ended up being so forgettable. Normally I wouldn't've picked a book like this up, because it felt like it'd be romance and I don't read romance. I ended up reading it because it was in some challenge and the ratings were good. I don't quite regret reading it, but almost.