Immortal Boss Books in Order

Immortal Boss is where Annika Martin swings from spicy billionaire rom-coms into low-spice paranormal mystery. The pitch is wonderfully weird. A practical woman learns that her family inheritance is not money, but service to an ancient vampire. Instead of running a castle, she winds up negotiating his feeding schedule, managing his affairs, and trying very hard not to notice how compelling he is.

Ms. Renfield and the Inheritance Trap lays out the world. The heroine is pulled from ordinary life into a long Renfield family obligation tied to Alexandru, a centuries-old vampire who is arrogant, dangerous, and used to being obeyed. She does not melt into the role. She bargains. If she has to work for him, he can feed only on people who deserve it. That turns the book into a mix of fish-out-of-water comedy, reluctant partnership, and serial-killer hunting.

Spreadsheets matter here almost as much as fangs.

The second book, Ms. Renfield and the Deadly Puzzle, keeps the same mix and pushes it further. A new murder, this time involving a crossbow bolt, sends Ms. Renfield and Alexandru into another investigation. The case is twistier, their working relationship is more established, and the slow-burn pull between them is harder to ignore. He keeps acting protective. She keeps pretending that is not a problem.

The setting gives the series a cozy shape even when the subject matter is dark. There are castles and old family obligations in the backstory, but there is also a small-town rhythm, errands, paperwork, amateur detection, and a heroine who keeps trying to make the impossible function like a job she can manage. That grounded voice is a big part of the charm. The books know vampires are absurd and threatening at the same time, and they use both sides.

If you are wondering about the romance, think slow burn first. Alexandru is the kind of supernatural boss who begins as a problem before he becomes anything softer. The attraction is there, but it builds inside the mysteries rather than taking over them. That makes these books a good fit for readers who want paranormal tension and character chemistry without nonstop heat.

Start with Ms. Renfield and the Inheritance Trap and keep going in order. Each case stands on its own, but the relationship and the family curse land better when you watch them unfold step by step. It is cozy, gothic, funny, and just prickly enough to feel fresh.