Wilder's Mate: He's a crude, gun-slinging, vampire-hunting hero who howls at the full moon and is overcome with lust when the moon goes dark. She's a smart, stubborn heroine who invents mad-scientist weapons. Also included: wild frontier adventures, brothels, danger, betrayal and a good dose of wicked loving.

Hunter's Prey: He's a mostly feral, vampire-hunting hero with instincts beyond his control. She's a tough survivor of a heroine whose retired-hooker heart is more steel than gold. Also contains: dangerous frontier intrigue, fancy brothels, mad-scientist weapons and a couple who can set the sheets ablaze with their passion.

Archer's Lady: He's a mostly retired bank-robbing hero with a weary soul and a charge to kill the undead. She's a partly reformed con-artist heroine with a bruised heart. Also look out for: vampire schemes, mad scientist plots, an alarming amount of dirty talk and some borderline-criminal bedroom antics.

Diana's Hound: She's a badass vampire-hunting heroine who isn’t afraid to fight dirty. He's a broody half-vampire hero about to discover a reason to live again. Also beware of: bloodhound-on-bloodhound violence, airship heists and some furniture-endangering sex with lots of possessive biting, growling and snarling.