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The manuals are general information about residential security, personal safety and fraud prevention. They are not legal, financial, engineering or medical advice. Building codes, fire and egress codes, landlord-tenant law, recording law and self-defense law vary by state and by municipality — follow local guidance and manufacturer instructions, and verify anything in these pages against the rules where you live before acting on it. Prices quoted in the books are United States retail figures current to 2026 and will drift.