Possible Clues:

• "The Sorcerer's Apprentice" and others
• Strangely, casual attire on you at first elicits words of warning
• Fables, often
• Rule a staycation out — Belloc's warning lines
• "The Dreadful Story of Pauline and the Matches" and others
• Light verses in books concealing a reality I lost in translation
• Lengthy warnings