By Stephen Key: One Simple Idea: Turn Your Dreams into a Licensing Goldmine While Letting Others Do the Work

One Simple Idea for Startups and Entrepreneurs: Live Your Dreams and Create Your Own Profitable Company (Business Books)

Sell Your Ideas With or Without A Patent

Invent It, Sell It, Bank It!: Make Your Million-Dollar Idea into a Reality

One Simple Idea, Revised and Expanded Edition: Turn Your Dreams into a Licensing Goldmine While Letting Others Do the Work (Business Books)