June Books 7) Wonderbook, by Jeff VanderMeer
Having only dipped into this, I gave it my vote for the BSFA Award (which it won); now I've read it from beginning to end, and feel confirmed in my immediate reaction that this is an excellent and beautiful guide to the craft of writing, and specifically fantasy writing, with insights not only from VanderMeer but from many others (including an interview with George R.R. Martin). I don't have particular ambitions to write fiction myself, but I found this very useful in looking at how stories come into being (and perhaps how they can be improved, even that doesn't always happen). The one annoying thing is that the numerous inserts on particular themes do quite often break up the reader's experience of the flow of the book. But even there it's not as bad as The Steampunk Bible, from the same stable.