Greg is co-author of five books & workbooks. The Silhouette Man (189 pages) is geared to adults. It is in its 10th anniversary edition. The First Thirty (96 pages) is the condensed edition of the story, geared to 5th-12th grade reading level (and adults who prefer shorter stories). It is in its 15th anniversary edition. A Place To Sit (300+ questions & activities) is the companion workbook that can be utilized with either book. The Milkshake Man (42 pages) is the illustrated edition of the story, geared to Kindergarten-4th grade reading level (and kids at heart). It is in its 2nd anniversary edition. One Lunch (200+ questions & activities) is The Milkshake Man's companion workbook. The books and workbooks are all paperback. To see front covers & Page 1 reviews, click here. To read more reviews, click here. To see the Picture Gallery featuring readers, click here. To order copies, click here.