This is available, Melb SE or if you pay postage:
It's a good book, however 1) I think navigation is over-rated, and 2) I think Jeff Toghill's book Coastal Navigation is much easier, and a shorter book.
I did a nav class 20 years ago, and in my coastal sailing I use the GPS and plot positions every 2 to 3 hours, and know where I am pretty much. I also rely on the fishfinder (as depth gauge) and the compass occasionally.
So the book above is free. The included chart is Falmouth to Plymouth UK.