Okay, so on one hand it's pretty cool that this series is bringing in more diverse mythology outside of the standard vampires. On the other hand, I was not prepared for what the night stalker was/did. (If you're from a Latin American background, you may have guessed what it was. I had to look up the name when it's finally revealed.)
I usually don't like trigger warnings as I personally find them patronizing. But. In this case, I'll make an exception. The villain sucks the blood/kills small animals, specifically cats and dogs. It doesn't go into a lot of detail but yeah. The dog (and a lot of cats) die. (One dog makes it though!)
That said, I enjoyed the romance between Sara and Ricardo. It's also fun to see the characters from the previous books reappear and help out the heroes. Oh, I also enjoyed the Spanish sprinkled throughout and was quite proud I understood it without the context clues, though there is usually a translation for those who don't. For instance, a character will ask another "Sabes?" and then the next sentence is He knew.
Overall, outside of the fate of the small animals, it was another fun, fast paced Paranormal Romance with the vampire fun of the 2000s and a Latino twist.