4.5-ish? 
 Didn't expect that romance aspect haha. It seemed a bit overwhelming (not sure if that's the right word but like having two big ideas tackled is a lot), but I personally think it added to the story rather than detracted from it. (Ugh, was that correct grammar? #confused ) Although it wasn't totally convincing why Sarah would like Linda.... 
 This book got slow at times, but wow, it had a lot to say overall.