The Permaculture Home Garden - Linda Woodrow - Viking publishers - 1996 (Aus), and
Lawns into Lunch; Growing Food in the City - Jill Finnane - New Holland Publishers - 2005 (Aus)
Lawns into lunch covers the principles and how people have applied them - very good for motivation! The PHG gives a whole food production system along permaculture lines that can be implemented in your backyard. You would need a decent size back yard to do the whole lot, but I am following some of the ides in this one and it is good!
My problem (well one of them
) is my lack of planning, I tend to plant and harvest and eat, but not big on planning. Both books extoll the benefits of having a plan so I am taking a hint and preparing a plan for the next 12 months. That will keep me busy 
!Nev