by Eliot Coleman. When Eliot Coleman claimed that in mid January in Maine (where it gets down to -20 degrees F), he harvests 18-20 fresh vegetables, it seemed unbelievable. Take a closer look and you'll discover he opened up a whole new venture in gardening. Note he says 4 season harvest, not growing. His system depends on constantly clearing out spent crops, and replanting with crops appropriate to the coming season so that one always has a fresh crop to harvest. His system for extending the harvest season is based on the use of cold frames, plastic tunnels, root cellars, and hardy vegetables. Coleman does not use a greenhouse or any fancy heating systems. His aim is for utmost simplicity in achieving his goal of fresh, flavorful vegetables year round. Softcover 236 pp.