Walter The Worrier by Allyson I. Aborn

Walter is a worrier. His life is a never-ending series of "what ifs". What is bad guys break into his house? What if he needs a shot? What if he is struck by lightning? Walter worries so much he cannot just be a kid. His worries profoundly affect how his family lives as well. No matter how hard his family tries to help him out, the worries interfere with every aspect of daily life.