No Mystery Anymore: A No Frills Guide to Mystery Shopping
Mystery Shopping for Beginners
Mystery Shopper's Manual, 6th Edition
How to Become a Mystery Shopper, The Only Book You'll Ever Need, Expanded & Updated Second Edition
Mystery Shopping Made Simple: How to Earn Good Money by Shopping, Dining Out, and More!
The Mystery Shopper Training Program Book: All You Ever Wanted to Know About the Best Part-Time Job
Starting Your Mystery Shopping Business