Anyone who picks up Fall of Man in Wilmslow believing it to have the lightning pace and other qualities befitting a thriller is in for a shock. I've seen snails move faster than the pace of this book, and although it satisfies a bit here and there, it certainly doesn't in most areas.
There are biographies of Alan Turing that will tell you more about this fascinating and cruelly treated man than Lagercrantz's novel. Instead it's more of an exploration of the character of Leonard Corell, a young, dissatisfied man who feels as though he's never lived up to his childhood dreams and potential. During the course of the book, Corell will learn just as much about himself as he will about Turing.
As he begins to investigate, his beliefs are colored by witch hunters who firmly believe all homosexuals are evil Communist spies; however, his opinions change the more he learns about the dead man.
It was a fight to keep my interest in this book. There are just too many deadly dull pages of math, theory, and philosophy-- and I will be the first to admit that those subjects work better for me as personal cures for insomnia. So yes, I skimmed. The book only truly came to life when Corell spoke to people who actually knew Turing, but that didn't happen often enough.
As an exploration of a young man's character, Fall of Man in Wilmslow is a very modest success. On almost every other score, it came up lacking.