Writing a biography is one thing, getting inside Philip K Dick's mind quite another. In this novelisation of the science fiction writer's life the biographical facts are incidental, and reconstructing the amphetamine fuelled thoughts that drove him to write, divorce (four times?), attempt suicide (twice), and invent and inhabit his own fantastic and fear-filled worlds is M. Carrere's objective.
He succeeds brilliantly. It's astounding that in his paranoid delusional state Dick achieved so much, although paradoxically that's what drove him. It's a testament to M. Carrere's skill that his portrait is so lucid. His book could so easily have fallen apart, as Dick did.
If you've seen some of the films (Blade Runner, Minority Report, A Scanner Darkly) or read some of the books (The Man in a High Castle, The Three Stigmata of Palmer Eldritch, Ubiq) reading this book will enhance your appreciation of them. You'll suddenly realise what Dick was getting at, where before you'd enjoyed the ride.
It left me wanting a 'proper' biography (which exists, it's by Lawrence Sutin). That's not a criticism, Dick's universe had little room for reality. He discards the bit players in his life when they cease to be relevant. Now I'd like to know about Dick, as they saw him. The 'real' Dick, perhaps.