I loved the book's plot, the twists kept coming, right from when the FBI hero is bitten and turned into a werewolf to finding out that heroine, the doctor in the facility the hero has lusted after for a year is a vampire and step-sister of the director Pate. The heroine was turned a year ago saving her brother. Pate, dude, he needs lessons, he was so manipulative and creepy. I loved the whole prison thing and finding out that the hero came from a werewolf family. Very good setup for the series and the romance was engaging as well.