I hardly do any preplanning, just fretting and wheel spinning. On quite a few occasions I’ve thought. I’ve got to sort this out before I begin writing, but the only way to arrive at the right way to do it is to crack on and see what works. The process of book writing for me is entirely one of trial and error. Likewise questions of structure. I get the idea for the structure of a book at some point, but rarely at the beginning. I accumulate a quantity of material, and at a certain point some idea of a structure will emerge that’s both the product of and appropriate to the subject. I’ve written books about loads of different subjects, but that wouldn’t count for shit if I just gave each subject the same treatment. In each book I’ve had to arrive at a form that was appropriate to that subject.