I enjoyed the characters a lot. Riley's enthusiasm towards the littlest things was both entertaining and endearing. I loved how Mateo, this big strong assassin, was so enamored with Riley he was willing to do anything for the man. The two together are adorable. There are a few extremely sweet moments in this story where all I could do was say, "Awww", they were just that cute.
The book has a few suspenseful parts that keep the reader engaged and a somewhat mystery that I didn't really see coming. I enjoyed the story although there was too much sex for me. I'd say half the book is full of smut. I also kept getting dragged from the story by the bad editing and head-hopping which was pretty bad to where we actually got both sides of a phone conversation when the speakers were on opposite sides of the country, within just a few paragraphs.
With that said, I did really like the story. I'm still intrigued on how it will transition from contemp to pnr and I look forward to reading more of this series and seeing the rest of the team get their HEAs.