First of all, this book is smutty (not that it's a bad thing, but be warned). I don't remember if the previous two books were like this, but because Poppy and Winston are already married, the smut starts early in the book. I mostly read it in a hotel lobby and on a plane next to two gentlemen, so I was hoping no one was reading over my shoulder. Wouldn't want to give someone a heart attack.
The story was good overall, but the ending felt a little contrived and too convenient after the build-up throughout the book.
Also, with Poppy's pregnancy, one we're led to believe that she's wanted for a while, I would've expected her to be more concerned about her condition. Instead, she launches herself into fights she could've avoided. It's almost like the pregnancy was added after the book was mostly written, because she's rarely concerned for herself or the child when fighting.
I'm looking forward to the next book, because I think the pairing will be interesting.