I loved this book for several things:

• How real and solid the historical-London setting felt. I'm used to that sort of thing feeling very flimsy, but this is an author who clearly does deep research and lets it suffuse the writing without getting all 'splainy.
• The very palpable tension between the protagonist's precarious position and her need to have some freedom.
• The delightful-if-implausable retconning of Sir Christopher Wren's secret motive for shaping London the way he did.

#SFFBookClub