"The separate sections of this book were written during the twenty years up until 2011; the allotted prose parts are now butted together to make a consecutive set. The process of writing was variously prescriptive and artificial: transcription from manuscript or speech, via word processing and assembly, to the final format of a single leaflet or booklet. Subsequently, most have been published again, reformatted as 'online texts', where in each case what was a paged sequence has become a scrollable depth-a vertical and bottomless page."--Page [5].