Her Guardian Angel by Larissa Ione

After a difficult childhood and a turbulent stint in the military, Declan Burke finally got his act together. Now he’s a battle-hardened professional bodyguard who takes his job at McKay-Taggart seriously and his playtime – and his playmates – just as seriously. One thing he never does, however, is mix business with pleasure. But when the mysterious, gorgeous Suzanne D’Angelo needs his protection from a stalker, his desire for her burns out of control, tempting him to break all the rules…even as he’s drawn into a dark, dangerous world he didn’t know existed. Suzanne is an earthbound angel on her critical first mission: protecting Declan from an emerging supernatural threat at all costs. To keep him close, she hires him as her bodyguard. It doesn’t take long for her to realize that she’s in over her head, defenseless against this devastatingly sexy human who makes her crave his forbidden touch. Together they’ll have to draw on every ounce of their collective training to resist each other as the enemy closes in, but soon it becomes apparent that nothing could have prepared them for the menace to their lives…or their hearts.

So two things to start with. One, I thought this was going to be a novella, but it turned out to be a full-length book. Two, I'll admit I was a little skeptical about how this author was going to make a paranormal book work in connection with the Masters & Mercenaries world. It turns out; it worked very well because the book was set in the Demonica Underworld world.

That said, this was one of the better ones in that respect, and I read it without too much confusion. Although if I had to guess 98% of the secondary characters were from previous Demonica Underworld books. In any case, the writing was quite good. It was well paced. The plot was engaging and had me curious enough that I may give the Demonica Underworld series a try when I have some extra time. It had a great cast of secondary characters. The sex scenes were fairly hot (but there were not many of them). I liked both Suzanne and Declan. It was pretty low angst, and there wasn't any OW or OM drama. I've read five out of the six books in the crossover so far, and this one was definitely one of the better ones. Therefore, yours truly is going to give it two thumbs up.