Organic Housekeeping: In Which the Non-Toxic Avenger Shows You How to Improve Your Health and That of Your Family, While You Save Time, Money, and, Perhaps, Your Sanity by Ellen Sandbeck
I must confess that I like books about housekeeping. It's some sort of weird sickness. I own and have read multiple times Home Comforts: the Art and Science of Keeping House. The problem with that book is: when I finish it, I always feel like I'm living in squalor.
Organic Housekeeping is both a lot more reasonable and more geared towards being environmentally friendly. I really like all the suggestions for ways of cleaning that don't involve nasty chemicals. And the more laid back view of what it means to be clean. Plus, she's funny.