This fourth adventure in the Paranormal Scenes Investigation series had all the thrills and adventure that is the series' trademark. It combines police investigation, though the PUPIs aren't members of any police force, and magic. PUPI is an organization of magic users who investigate magical crimes. The story begins with an investigation of the kidnapping of a little human girl. Two members of the Fae bring the case to them because they don't want to be blamed for breaking the Palisades Treaty. Working for a Lord and Lady of the Fae isn't easy but there are possible future benefits. So Ian Stosser, one of the bosses of PSI, takes the case and assigns Bonnie to try to find the girl - discretely.Bonnie calls in favors from friends we have met in earlier books in this series and in the Retrievers series when she visits Wren, a famous retriever, and Danny who is half-faun, a private detective, and a former police officer. Bonnie's case seems to be intersecting with Danny's as he also has missing kids to find. Together they determine that someone is trying something magical the needs 7-year-old, 14-year-olds, and 21-year-olds. She finds her little girl with the help of a dryad and also finds a totally untrained talent. She knows this girl needs a mentor and decides to take her to Wren.Ben Venec, meanwhile, is taking some time off from being the other boss at PSI and decides to take a side job of his own in Philadelphia. He and Bonnie have a sort of magical relationship called a Merge which both are denying because neither wants magic to decide their life for them. But when Bonnie gets a couple of days off, Ben invites her to join him in Philadelphia. They could work on their relationship. At least they could if they didn't stumble on a murder case. There is a serial killer targeting and killing Talents. Ben, Bonnie and the whole crew get sucked into the investigation.I love Bonnie. She is smart, tough, caring and has a strong sense of justice. I also love the relationship between Ben and Bonnie and am glad that they have moved on from ignoring the Merge and are trying to figure out how to fit it into the life they want to lead. This was a very entertaining story. I recommend it for lovers of urban fantasy.