Rather than digging or tilling the soil, the author encourages us to build it up by layering organic materials on top of the soil before planting and then keeping it mulched once the plants are growing and throughout the season.
I'm giving it a whirl on two new gardens this fall in preparation for spring planting. For the herb/perennial bed a thick layer of spoiled hay has been laid down already and more will be added on top of that as fall progresses. By spring the soil underneath should be soft and loose from the work of microbes and earthworms, and then I'll plant the herb seedlings right into it without any tilling at all. For the new cut flower garden, it will be a modified version of this method. the beds were spread with manure, tilled and planted in spring oats as a cover crop with the paths left untilled and covered with wood chips. Once the spring oats have been winter-killed, the beds will get layered with various mulches. Next spring, flower seeds and seedlings will be planted directly without further tilling.
Eventually, I want to do all of the gardens in permanent beds with walkways in between and hopefully do away with tilling altogether. As with all of this, a little bit at a time and we'll see how it goes.