These books are basically romances set during a war between werewolves and vampires in the jungles of latin America, and will probably make more sense if read in sequence.
At the start of the book the heroine, a human woman called Marissa Vasquez, has been kidnapped by a cruel and sadistic vampire called Herrera and taken to his manor someone in the jungles of Belize. Marissa is the niece and heiress to a ruthless billionaire oil baron, Luis Vasquez, who had also been a vampire. Refusing to play the part of a pawn in her uncle's evil schemes she had escaped from his concentration camp, also in the Belize jungle. She had been sheltering with friends at a ranger camp in Tenessee, when it was attacked by vampires and she was kidnapped again. Herrara plans to blackmailing her into marrying him by threatening to torture and kill people she loves.
At the same time as he kidnapped Marissa, Herrara also captured Navarre, a shapeshifting Shadowman from another world, who she meets in his wolf spirit form in their dreams, but whose physical form is badly injured and blind. Herrera is only one of the evil vampires who Marissa, Navarre and their friends will have to escape and defeat if they are to have any chance to find happiness together ...
Lots of action violence, suspense and horror, with an elaborate cast of various vampires and super-vampires, ambitious generals and colonels, and the shapsehifting "Blood Hunters" from the spirit world (who despite the dark-sounding name are the good guys). If you are into the supernatural romance genre you may possibly like this series.
From the ending I suspect that there will be at least one more book in this series.