Surprisingly, as much about activism as it is about gardening. Strong on the why, and not as strong on the how. For example, I appreciated the big picture lessons like to improve your soil before rushing to plant. But I had to go to the Internet to flesh out the details of HOW to improve my soil.  Not high on the to-buy list, but a quick read and if you are only in it for the gardening tips, you only have to read about half of it anyway.