A monster assembled by a scientist from parts of dead bodies develops a mind of his own as he learns to loathe himself and hate his creator.

Eighteen-year-old Cassandra Leung struggles with her morality and her romantic relationship with fellow pirate Swift Kent as she and the Minnow pirate crew work to take down wild sea monsters, dubbed Hellbeasts, who are attacking ships and destroying the ocean ecosystem.

"Taj has escaped Kos, but Queen Karima will go to any means necessary--including using the most deadly magic--to track him down"--

When Dr. Warthrop begins to doubt fourteen-year-old Will Henry's loyalty, he sets him against one of the most horrific creatures in the Monstrumarium unaware that Will's life and his own fate will lie in the balance.

It's been three months since Amy escaped New Hope. Three months since she's seen Baby, or Kay, or Rice. And she's been surviving on her own, like she did before she was "rescued" and taken to what she thought was a safe haven. Then, in the midst of foraging for supplies, her former fellow Guardian's voice rings out in her earpiece. And in a desperate tone, Kay utters the four words Any had hoped she would never hear: Dr. Reynolds has Baby. Now it's...

When a new monster, who feeds on chaos and brings out its victim's inner demon, emerges from the shadows, Kate finds herself lured home to face a monster she thought she killed, a boy she thought she knew, and a demon all her own. August Flynn is a monster who can never be human, and in Verity he has become the leader he never wished to be. Kate Harker is a girl who hunts monsters, and in Prosperity she has become a ruthless hunter. When a new monster...

Sixteen-year-old Mackie Doyle knows that he replaced a human child when he was just an infant, and when a friend's sister disappears he goes against his family's and town's deliberate denial of the problem to confront the beings that dwell under the town, tampering with human lives.

Marlow Green is a high school boy in New York who is always in trouble for vandalism and acting out, until one day he stumbles into the middle of a battle with a demon, and learns about The Devil's engine--an ancient machine which can grant anything you wish for, in exchange for your soul.

Cassandra Leung--a seventeen-year-old trainer of Reckoners, sea beasts bred to defend ships--is kidnapped by the pirate queen Santa Elena and ordered to train a Reckoner pup to defend Santa Elena's ship.

In 1888, twelve-year-old Will Henry chronicles his apprenticeship with Dr. Warthrop, a scientist who hunts and studies real-life monsters, as they discover and attempt to destroy a pod of Anthropophagi.