For the Eye Sees Not Itself. SIS Case Files, #4

The SIS team has dealt with all sorts of things that go bump in the night--vampires, zombies, even demons. But not everything odd or occult walks or breathes. The CIA calls on SIS leader John Benchley to alert him to a strange set of occurrences around an abandoned house in Baltimore. Investigating, the SIS team stumbles on to something unprecedented and deadly. And not every SIS member gets away from their encounters unscathed.
Life continues to go on--even around vampires, mad scientists and demons. SIS FBI liaison Gabrielle Dichenz, who is the lover of both John Benchley and Evan Garrett, John's boyfriend, is coming to terms with her new life. Recovering from her past with an abusive ex means looking closely at her present. Evan's waiting patiently to integrate both of his lovers into his wider life. John, on the other hand, isn't the sort of personality who takes well to waiting.
There's something really good growing between the three of them. Gabrielle just has to decide whether to truly grab for the brass ring or let her past dictate the shape of her future.