Here it is.
Click the book cover to get to the PDF. Download it, save it, tell other people about it (but please send them here to get their own free copy, rather than giving them yours 🙂 ).
To download, right-click the link to see the contextual menu, and chose “save link as …”,  “save target as…” or whatever similar choice you are given. We’ll publish the book in more formats later. Which ones are you missing? Let me know in the comments.
I’ve already put a lot of work into this book – but I expect to put a lot more. Based on your feedback I will continue to add chapters and sections, and revise and update it. So please let me know what you think by leaving a comment below or sending me an e-mail.