Proper young ladies in the 1920s don't get dirty, and they don't get into fights. But Colleen's uncle is killed, and she wants answers. When a sinister cult targets her, she pushes back - hard. Now she's running for her life. It will take all her courage, all her strength, and every steam-powered weapon she can devise to keep her alive long enough to unravel the mystery of her uncle's death.

What is Tanathos, and why will a mysterious cult kill to find it? Armed with the remnant of a burned map, Colleen Garman is in the Dutch East Indies, trying to solve the mystery of Tanathos. But the South Pacific in the 1920s is a dangerous place, and the cult is hot on her heels. From a rooftop chase in Java to a showdown in the jungle on an isolated island, she's fighting for her life and trying to stay one step ahead of the cult. The stakes have never been higher. The cult wants to open a portal and let a mad ancient god loose in the world. And Colleen knows the danger is real. The malevolent god has started invading her mind... Isolated and betrayed, faced with murder and mayhem, Colleen is in the fight of her life. She will need every scrap of courage, every shred of ingenuity, every steam-powered gadget she can devise, if she is ever going to make it off of Dark Island with her life - and her soul.

How far would you go for a friend? What would you risk? A devastating raid by the cult of Katharis leaves Colleen Garman alone, faced with a formidable task. The world itself hangs in the balance as the cult opens a portal to another realm. Colleen's duty is plain - she must close the portal at any cost, and keep it closed. But her old friend Carter is trapped on the other side. To get him back she will have to risk everything. Her only ally is Dirk Smith, a government agent locked up in an insane asylum. Somewhere in his shattered mind are the clues she needs to thwart the cult, get back the portal stones, and attempt a rescue. The stakes couldn't be higher. She risks setting the mad god Katharis loose in the world. But if she succeeds it could mean salvation for Carter - and maybe even Smith, as well.

Colleen Garman has faced homicidal cultists, determined assassins, and monsters from beyond this plane of reality, but this could be her most terrifying assignment yet. She has to travel to Monaco, and crash a party. Benedeto Disaronna is a spoiled young prince, ruler of Capria, an island in the Mediterranean that he cares nothing about. But the cult of Katharis has taken an interest in Capria. Colleen doesn't know what the cult is after, but she knows she has to stop them. Ben doesn't care about cults, and he has no desire to face a murderous governor, his armed henchmen, or a band of sky pirates. He thinks he can walk away, but he hasn't planned on Colleen. She needs him to do what's right, and she won't be taking no for an answer. She's taking on the cult of Katharis, and Ben is going to help her, whether he likes it or not!