Possible Clues:

• Novelist Cather
• Author Cather
• Writer Cather
• American novelist Cather
• Cather who wrote 'My Ántonia'
• Cather who wrote 'O Pioneers!'
• "O Pioneers!" novelist Cather
• 'My Antonia' author Cather
• 'O Pioneers!' author Cather
• "O Pioneers!" author Cather