The Contortionist's Handbook isn't perfect. If I had to pick out flaws I'd zero in on the heavy reliance on research to sustain interest in what is, basically, a novel of four fifths backstory and one fifth current predicament. I'd question the portrayal of mental institutions and psychiatry as still stuck in 1950s methodology and attitudes (remembering that the mc was born in 1970). I'd suggest that the predicament of the main character probably isn't dire enough to justify the radical nature of the solution he chooses. I'd say that three way sex isn't usually the hallmark of a relationship that's going to last.I'd say all that and then I'd say that it is brilliant.