Fantastic book. Everything a biography of a philosopher should be: objective, humanising, an exploration of the philosophy, but also the man Wittgenstein. This paints all the good, bad, and the ugly with such clarity, something Wittgenstein himself would appreciate (though he would likely hate having a bio written about him).

Wittgenstein is an endlessly fascinating philosopher: visionary, insightful, original.
But he was an absolute curmudgeon: intense, fussy, obsessive, and eccentric (and not the fun way).