This book is so good, I can't even explain. It's about a young woman named Cather who write fanfiction using characters from a book series that is like Harry Potter, but isn't. She goes off to college and takes a fiction writing class, but she doesn't want to create her own characters--she loves writing fanfiction so much she can't make the transition to writing "real" fiction.
If you like Harry Potter, you'll like this book. If you like fanfiction. If you like slash fiction. If you like love stories. If you think the real love story in the Harry Potter series was between Harry and Snape. If you like good writing. If you like Nebraska. If you like realistic, contemporary young adult fiction. If you want to know what life is like as a first-year college student.
I loved one of Rainbow Rowell's other young adult novels, Eleanor & Park. But I loved Fangirl even more, I think.
If you've read them both, which did you like better? Eleanor & Park had more pathos (nothing wrong with that). Fangirl is funnier, but it still had plenty of dark moments.