Rodale's Illustrated Encyclopedia of Organic Gardening

This is a fabulous book for the photography; I feel inspired to get out into the garden every time I flip through the pages. And then I realize that I'm not in England and my garden will never look as good as these, alas.

From A to Z, everything you can think of about gardening, the organic way. It's been a boon to my gardening efforts since about 1985.