There is not much to say for this book except for... 
 I've never had a problem with the historical romance chick-lits until now. All the time while reading it, I kept waiting for someone to jump up and reveal that this book is actually a contemporary, posing as a historical romance. I found this particular issue with all the books in this series, and more so with this one. 
 What is even more annoying is how the author has manhandled the timeline of biological scientific discoveries. Oh she's good with that. Everything is roughly around the same time but the conviction and the amount of material with which the characters discuss their research and discoveries would annoy anyone who's read read science even a little bit. One could almost see the the hereditary principles of reproduction had been solely developed and discovered by the characters in this book. 
 The author is definitely great at writing...maybe. But she completely lost me with this book.