In truth, this is a patchy book. Scott-Morgan’s writing can be moving, gripping, honest and funny, but also wearisome and self-indulgent. Rather too much of it is dialogue. I enjoyed the first half; the second, where he enlarges on his Unwritten Rules of the Universe and veers into sci-fi fantasy, less so. Like so many on the brilliant-bonkers continuum, he has a big ego. But no one could fail to wish him well. He has been dealt the cruellest of hands and I dearly hope that for his sake, and for others with awful neurological diseases, he succeeds in his extraordinary goal.