This book looked interesting. Two college associates secretly experiment with extra-sensory perception, and one encounters some old mirrors of obsidian of a type associated with Dr. Dee, Edward Kelly and ancient Aztec worship. But any interest is quickly ruined by the style. The book has three main characters, the conniving and mysterious Doctor Wiston, and the researcher Gwyn Thomas, who is doing some kind of sensory deprivation experiments on John Born, who then has visions and becomes obsessed with mirrors. The setting, per the blurb, is the University of Cambridge, but no location is specified in the novel. Within the first few pages we learn that Born is already dead, and the novel plays out as a kind of unnatural compendium of mixed perspectives that shift all too quickly between characters (and the dead Born's very descriptive letters he wrote to his mother). As a technique this might be made workable, but the real problem lies in the unfathomable motivations of the characters. Wiston, who is not directly involved in the experiments, happens to be a collector of antique mirrors (and a gourmand--all food is lovingly described at length), and manipulates the other two without the reader ever being let in on what he is up to--which on its own seems to change through the book. So it all comes across as a bunch of unfortunate and cryptic scenes without causal logic that add up to nothing other than boredom.
