Our weather is erratic this year so I am not following the book too closely.
I keep an eye on weather forecasting and plan ahead for direct sowing. In early Aug we got multiple rain showers so I sow daikon radish and mustard greens underneath corns. After I harvested the corns I cut the stalks off the ground so as not to disturb the roots. So far the veggies are doing great, the daikon roots are over 1" thick and I am anticipating a good harvest.
I also follow the volunteer plants and plant along side. After I harvested garlic in early summer, some bulbs were left in the ground. in mid Aug, they were already growing new leaves. So I started burying more cloves in ground where there were vacant spots. These garlic got longer growing time to form bigger scapes and bulbs next year. They are also evergreen throughout the winter, helping to trap fallen leaves in the garden area as a thick layer of mulch.