Maryann Karinch is the author of 12 books, including five co-authored with Greg Hartley, namely How to Spot a Liar (Career Press, 2005), I Can Read You Like a Book (CareerPress, 2007), The Date Decoder (Adams Media, 2008), How to Be an Expert on Anything in Two Hours (AMACOM, 2008), and Get People to Do What You Want.