From Magazine of Fantasy and Science Fiction, April 1989:
Greenmantle is not only a gripping thriller but also an introduction to the most profound philosophical issues in literature what stories are for and how they create us. …de Lint shows an awareness of what he's doing that makes his fiction not just a damn fine read but also a clear map of the road that fantasy follows through the human mind. …with Greenmantle, he shows that, far from being mere escapism, contemporary fantasy can be the deep mythic literature of our time.
From Locus Magazine, December 1987:
Charles de Lint is one of my favorite fantasy writers. His juxtapositions of classical folklore with modern settings are full of power and beauty. His novel Greenmantle, is no exception: strong characters deal strongly with themselves and the supernatural. What is unique about this book is that the supernatural element is not the problem that most of the people are dealing with. It's an integral part of the story, but it is seldom threatening and it's generally beautiful. In most fantasies, the supernatural is the focus: here the focus is on people learning to stand their ground.
From Fear Magazine, March 1991:
Constructing a fantasy around the mythical figure of the horned god and interweaving it with a hard-hitting contemporary thriller is a nice idea in theory. In practice, when a story tries to cross genre boundaries or mix genre elements, it tends to lose its focus and fall into a vacuous no-man's land. Charles de Lint has succeeded magnificently where many have failed. Greenmantle fires on all cylinders and on all levels, especially in that difficult interstice between fantasy and reality. By turns poignant and upbeat, without being schmaltzy, this engrossing and pacy story will hold your attention from first to last and beyond guaranteed!
From Rave Reviews, 1988:
Greenmantle sings to the intuitive mind with a clear, sublime and evocative sound. De Lint tells us that Greenmantle was partly inspired by Lord Dunsany's fantasy The Blessing of Pan. To my mind, de Lint's adaptation of this little known work represents the state-of-the-art of fantasy today. Greenmantle is made uncommonly vivid not only by a tightly wound plot, a modern-day setting, and a good number of well-drawn, sympathetic characters, but also by the author's rare ability to awaken in the reader a sense of knowledge and wonder about a level of latent reality that remains hidden or only half suspected.