Possible Clues:

• Silverstein who wrote "A Boy Named Sue"
• Silverstein of kid-lit
• Silverstein who wrote 'A Boy Named Sue'
• Poet/illustrator Silverstein
• 'A Light in the Attic' author Silverstein
• Kid-lit author Silverstein
• Writer-illustrator Silverstein
• Kid-lit poet Silverstein
• Author/illustrator Silverstein
• "Where the Sidewalk Ends" poet Silverstein