Why do some people have their hands in dirt? What causes someone to become obsessed with the process of growing something, whether it be a tangle of flowers, chiles hot enough to make your eyes water, or a rambling rose plucked from a tumbledown house? Author Robin Chotzinoff took a road trip (several, actually) across America to find the answers. People with Dirty Hands is what she found.

It rings with the voices of people singularly possessed: Margaret Sharpe and Pam Puryear, founders of the Texas Rose Rustlers; Doug Beck, president of California Garden Ladies, who harvests hibernating ladybugs from their leafy beds for commercial sale; and Bill Palmer, whose garden is home to 450 tomato plants, simply because "You really can't buy a tomato".

In vivid style, Chotzinoff captures the all-encompassing fervor - and hope - that can drive a person to create a vegetable garden from a concrete, hypodermic-strewn landscape or to plant seed while snow still threatens. It is the immutable promise of life.