Live by the law, die by the talon. Griffin Ranger Harrell White-shoulders is undisputed master of his territory. His word is law, and he enforces it with deadly beak and talons. He’s never encountered a problem he can’t overcome…until now. An exotic griffin from the other side of the world, Kwaperramusc is the premier Investigator for the Griffin Rangers. He’s never come across a crime he couldn't solve or a mystery he couldn't unravel… until now. When Ranger Harrell receives news that his adolescent daughter Aera and four of her friends have vanished while traveling through the Great Plains, he flies far from his familiar territory to the isolated prairie town where she was last seen. Along with the Investigator and their young assistant Tirrsill, Harrell is determined to find out what happened, no matter how many bodies he has to go through to do it. In the town of Crossline Plains, Harrell and the Investigator deal with uncooperative local griffins and outright hostility from the immigrant Greenies. He has no idea of the terrible secret he’s about to uncover, something so dangerous that those behind it are willing to kill Ranger Harrell, the Investigator, and anyone else with him in order to keep it hidden. And all of Harrell’s strength, courage and skill might not be enough to stop them.

Stranded—alone on an alien world, where the very air is toxic. Captive—held by terrifying, ruthless creatures who can’t be understood or reasoned with. Griffin The Monster Lands concludes the story begun in Griffin Crossline Plains, as Ranger Harrell seeks to discover the fate of his missing daughter and the other creatures taken by the greenies. Harrell White-shoulders and his companions find themselves trapped in a hostile, unfamiliar our own Earth. A world of thin, polluted air, deadly cars, and dangerous, xenophobic natives. Harrell is a prisoner of the greenie’s monstrous allies, where nothing is certain except that nobody leaves there alive. Investigator Kwap and Tirrsill are left utterly alone, fighting starvation, lethal disease, and the strange land’s terrifying inhabitants. Hunted at every moment by enemies who won’t stop until both of them are dead. Harrell and his companions struggle to endure captivity—witnessing unspeakable atrocities, fighting back any way they can—all the while knowing time is running out for all of them. Their only hope lies with Kwap and Tirrsill, who not only have to survive in a land determined to kill them, but outwit their enemies and find Harrell and the other griffins before it's too late.

A griffin tortured by memories. An outlawed book that corrupts anyone who reads it. It’s been two years since the events in the Monster Lands. Trying to forget the horrors he experienced there, Harrell White-shoulders lives in quiet anonymity, burying himself in security work along the Isthmus Canal. Construction of the mighty waterway connecting two oceans is nearly complete, and Harrell has had his talons full dealing with disruptive locals and squabbling workers. This is almost enough to keep the memories at bay . . .except for the flashbacks . . . and his terror of enclosed spaces . . . and the creeping influence of the monster’s technology everywhere he looks. When a young jungle griffin, KeeKee – accompanied by her life-long friend, Twig – asks Harrell to provide her with an apprenticeship, he reluctantly agrees. But the two have their own secrets. KeeKee doesn’t even want to be a ranger, while Twig is dangerously obsessed with the monstrous creatures beyond the gate, the “hoomins.” He hopes KeeKee’s apprenticeship with Harrell will be his ticket to working with the five captives being held in Defiancé. But unknown even to KeeKee, Twig possesses a book so dangerous every copy of it has been tracked down and burnt…except his. KeeKee’s education takes Harrell to the edge of the Frozen Continent, then down to the source of the Jungle River in search of an animal long thought extinct. But no matter how many miles he flies, he can’t escape the monster’s grasp. And this time he might not escape with his life.