Location of Writer's Guide?

A recent post mentioned one, but after a bit of click I haven't been able to find. Can someone point me towards it?

Of course, now that I've posted this message, I expect to glance at the screen and the guide in an extremely obvious location.

Goodgulf

1) Press the "About" button. 2) Look at the buttons under the words "The Library is dedicated to the fond memory of Ross of Kilahara".