If you enjoyed this, then I'd recommend Alice Oseman's novels, which are more somber and tense than the Heartstopper comics. This reminded me of Loveless in particular with regards to the setting and general character dynamics, but the main character in that book and the one in this book have quite different problems. This book is also a bit of a product of its time and some of the dialogue and attitudes are bit less culturally sensitive than a more contemporary book would probably be. I usually give books that I had a pretty good time with but didn't get really excited about 4 stars, but I can't quite give this book that rating. I started the book disliking all of the characters at least a tiny bit and none of them managed to fully grow on me. I mostly felt uncomfortable and worried while reading, right up until the end I just didn't trust that anything would be resolved or that Cath was going to make good decisions. I will say that it was interesting to read this after having read Carry On, since a decent percentage of the book is references to that story and the Simon Snow in-universe series. The audiobook narrator was a little too monotone for me, I had her sped up to 1.7 speed. 

There's not much I liked about this book which sucks because Rainbow has been so highly rated by people I know, and I have another of her books on my to-read shelf...

First off the writing was just weak; it had moments near the end where it got better, but overall - too many cringe moments. A couple examples...

"His eyes were that color you can't see in the rainbow. Indigo."

"Levi giggled. (Did guys 'giggle' or 'chuckle'? Cath hated the word 'chuckle.')"

"...leaning over her left shoulder. He smelled good. (Breaking news: Boys smell good.)"

There was also a couple moments in which the writing was very repetitive. One here where she restates things you mentioned just 10 pages earlier.

P. 231
"She started coming downstairs every morning when she heard the coffeemaker beeping. To check on him, to see him off.… Cath would make him breakfast while he ran—and after he ate and left for work, she'd fall back asleep on the couch. After a few days of this it already felt like a routine.... Cath would usually wake up again when Wren came downstairs or came home."

P. 242
"Their dad got up to jog every morning. Cath woke up when she heard his coffeemaker beep. She'd get up and make him breakfast, then fall back to sleep on the couch until Wren woke up."

Also, I thought this book talking about a fandom was supposed to be a spoof of Harry Potter - it's pretty clear from the way Rainbow talks about books, movies, the author, the plots, etc. and yet! Harry Potter is alive and well in this universe bc the characters mention it?? Weird...

My final complaint is on the characters - I personally didn't find them likable. There was a scene in which they talked about rape too lightheartedly. There's scenes in which the men seem to act chivalrous almost to the point of being offensive. Idk I just don't think I would hang out with any of them by choice (maybe the dad; he seems alright).

I was so scared reading this book, because I feared the moral at the end would be that fictional worlds are bad for you etc, but that didn't happend and I'm so greatful for that.

This book depictes a fangirl so well, I think I never related to a protagonist this much. I also really like that Cath doesn't have a super strong character development, she stays herself, she is the foundation the other characters can grow on.

For my liking there was a bit too much unchecked homophobia in this book, I wish some characters had commented on how wrong many reactions about gay fanfiction are.