What do a stolen watermelon and a grocery store robbery have in common? You'll have to read The Watermelon Mystery to find out. First, Bill and Poetry discover somebody's watermelon in their favorite spring. Next, they spot a thief in the Collins' melon patch. And then there's that mysterious rowboat on Sugar Creek in the middle of the night. Tracking down a mystery requires courage and conviction on the part of the Sugar Creek Gang. Before...