The release date has been pushed back to 2025 for some reason! This is irrelevant but I thought it was an interesting fact. 

The other reviewers are right -- this is two books in one. I really enjoyed the first half and practically hated the next. 

Renata was fine. She was fun at first, but some of her character's quirks and habits grew increasingly annoying as time passed. Brit was interesting in the first half and completely irritating in the second. The side characters were obnoxious throughout. 

The summer section was very good (I know I sound like a broken record but this is true): well structured, great development of character and development of relationship between them, decent world building. The fall section was not good, I did not like it whatsoever. A lot of the development was thrown out the window, the insults  were outdated and certain characters' reactions incredibly over proportional to the things that happened.

It's a fine book: it kept my attention when nothing else did.