There's not much I can say about this one. The Kellermans are my brain candy that I indulge in about once per year. The writing isn't stellar and the plots are formulaic but I've been reading them long enough to get interested in the characters and, since they are readable in less than 24 hours, they don't cramp my classical style! The content, however, is not something that I would want to expose myself to on a regular basis.
I enjoy the addition of their foster son, Gabe, to the Decker/Lazarus household. The Beast is a better-than-average book in the series.