I really liked this book. This book was one of the rare few books where you're sad to leave their world. That being said... There were a few things that really irked me. 
 The minor issue was with Jane hanging out with a man sixty years her senior alone. I find that would have been no way possible for her to do so without a chaperone. But the author went through great lengths to make it seem no one minded. So whatever. 
 My biggest peeve was with Sophie and Winston. How is it possible that she mopes about her previous boyfriend and frightened to date, but then immediately hops into bed with Winston? 
 "Sophie sat bolt upright in bed. Was it possible that the printer who started the Bayfield library was Gilbert Monkhouse? And might some of Monkhouse's books still sit in the family library? And did Winston know all this and think he could somehow extort these books from Sophie with his charm and good looks and promises of sex?" 
 Don't be stupid this is the exact reason. 
 She finds out that no one by the name of Winston ever went to St. JOHNS, that he must have know the inscription was to Jane Austen and she ignores all that? 
 "After the first time, they ordered room service. After the second time, Winston fell asleep and Sophie was just drifting off to the muffled sounds of the Oxford traffic when she remembered something and nudged him with her elbow." 
 Oh for god's sake here we go again. Seriously, if you read this book and Winston's name is mentioned it will be accompanied with something along the lines of having sex.