Haven't read this, but remembered the discussion here a few weeks ago about cutting grocery spending and thought someone might find it useful (I haven't done an actual budget recently to confirm, but am pretty sure our typical monthly grocery bill is in line w/ the "target" so didn't bother reading to see how she gets there). I've found some great recipes on the hillbillyhousewife site over the years though, and generally like what she has to say. Anyway, here's the link:
http://www.hillbillyhousewife.com/half/