Wow! My head is still spinning and I'm totally creeped out by all the secret watching and spying. This was a great read. Fast paced and intense. I'm glad there will be more books with Blackwell and Evans because they reminded me of Anne Perry's Charlotte and Thomas Pitt series--just modern London instead of Victorian London--and I ate those up.
The characters were distinctive and believable. I felt for Blackwell and his loss and worried over Sophia's need to see the good in certain people. Draper unfolded the mystery at a perfect pace, but kept all the most important things a mystery until the end. Loved it!