I'm a huge fan of Lisa Kleypas, especially her Hathaways series, but when I started this story I had mixed feelings about it.
The heroine of Hello Stranger is Dr Garrett Gibson, the only female physician in Britain. I had been so looking forward to reading about her struggle in the entirely male-dominated world of Victorian medicine - but found it ironic that the main part of the plot should revolve around Ethan, a government spy, and his problems. It didn't help that I usually love both historical romance and romantic suspense, but I'm not so keen when they're mixed together.
I did like the banter between the characters, the sweet way they kept bumping into each other around London, and the part when Ethan offers to teach Garrett how to defend herself in a rather less ladylike way than she has been doing up until now.
However, the story really picked up when one of the main characters becomes seriously ill. Garrett goes against all advice, including that of her mentor, to try and save this person. The heartrending scene where Garrett has to switch off her emotions to perform surgery was very authentic and put me through the emotional wringer too.
So despite my initial negative feelings, I ended up really enjoying the book and it is probably my favourite of the series so far.