Monster hunting isn't for the faint of heart! Twelve-year-old Rowan is next in line to be Queen; her twin brother, Rhydd, to be Royal Monster Hunter. Rowan would give anything to switch places, but the rule is, the oldest child is next in line, even if she is only older by two minutes. She resigns herself to admiring her royal monster hunter aunt's official sword and having tea with dignitaries with her mother, the queen. But a tragic event breaks up longstanding rules, and now Rowan finds herself in hunt of a dangerous gryphon. Accompanied by a feisty and determined baby jackalope and a giant wolf that barely tolerates her, she sets off on a journey that will see her join forces with other unlikely allies: a boy who has ambitions of his own to hunt monsters, and a girl from a nearby clan with hidden motives for befriending Rowan. It will take all of Rowan's skills, both physical and diplomatic, to keep this journey on track. The future of the kingdom depends on it.

Rowan is now the Royal Monster Hunter, and her twin brother, Rhydd, is destined to be king. But her mother's cousin Heward is still determined that his children be the ones to inherit the titles, and will stop at nothing to show that Rowan and Rhydd are too immature to properly lead. After the gryphon that Rowan captured in Book One gives birth but then dies, Rowan is left with a baby gryphon she knows she cannot keep. And it grows faster than anyone can imagine . . . In order to save face after an accident involving the troublesome gryphon, Rowan, with the help of her friends Dain and Alianor, along with an entourage of monstrous companions, must make a journey to the mountains to release the gryphon back into the wild. What starts off as a simple enough task soon becomes a dangerous quest, as the group encounters numerous rare and deadly monsters along the way, including wyverns and ceffyl-dwrs. Nothing is easy when you're a "monster magnet" like Rowan. Can she prove herself worthy of the title of Royal Monster Hunter?

Rowan faces her most dangerous monster-slaying challenge yet, confronting what could be the most infamous monster of all. Rowan is Tamarel's Royal Monster Hunter, and her twin brother, Rhydd, will be its king. After the events of The Gryphon's Lair, Rowan, along with her friends, her brother, and an entourage of monstrous companions, makes her way back to the Dunnian Woods to deal with the pack of dropbears the group trapped in an abandoned cabin after a vicious attack. The dropbears are just one of a number of rare monster species acting erratically in Tamarel. After a swarm of colocolos nearly tramples the group, Rowan becomes convinced that someone (or something) is driving these monsters out of their natural habitats. But nothing can prepare the Royal Monster Hunter for the truth of the matter: monsters even bigger and deadlier than gryphons have returned to the world, and their nest-building, as well as the actions of the humans trying to drive them out, has upset the balance of nature in Tamarel. Do Rowan's monster magnet skills work against the most fearsome monsters imaginable?

Rowan embarks on an expedition to prove once and for all that she is the rightful royal monster hunter, in the fourth and final book in this fantastical series. The time has come! After discovering the true reason for the monster migration, Rowan is on an expedition to ultimately prove that she is worthy of the ebony monster-slaying sword on her back. She and her twin brother, Rhydd, their friends Dain and Alianor, as well as some other trusted advisors—and the ever-growing group of monstrous companions—are on a mission to help protect the dragon living in their homeland and are travelling to kingdoms beyond to make their case. But not everyone agrees that people can live peacefully alongside monsters, especially when new terrifying creatures appear. It will take everything Rowan has to fight off threats of all kinds, from both monsters and people. It won't be easy, but if she succeeds, she will become Royal Monster Hunter at long last.