Readers of Bartholomew's Square Foot Gardening who were swept by his enthusiasm into trying his system have a new challenge: a sideline selling produce to a restaurant. From a small-scale start a gardener may expand to supply 20 to 30 percent of a buyer's vegetable needs. With his usual thoroughness, the author charts planting times, spaces, profits ($1-$5 per sq. ft.), and deductible expenses. He offers tips on harvesting to keep quality and profit high. There are even sample conversations to show how to deal with buyers. Although some gardeners find Barthlomew's plant spacing too close, the method usually works well, and those with time, space, and interest in profit will find this book entertaining and informative.