Introductions are the ﬁrst thing a reader will read, but often the last thing awriter will write. This introduction is no different. The book you are about to read has, as I type these words, already been written. I’ve done all the work, and now I can account for my intentions and the ways in which I may have deviated from them, and perhaps offer some guidance on how to approach the exercises, and explain certain usages and conventions. I might attempt to reassure you about my competence to write a book about writing. Certainly I ought to be clear about my anticipated audience; I should be clear about ‘you’.