Lost paperback copy of 'To Kill a Mockingbird' with owner's name inside cover at the Walmart parking lot in Cape Girardeau.

I misplaced my copy of 'To Kill a Mockingbird' in the parking lot of the Cape Girardeau Walmart last Friday. It's a paperback edition with my name written inside the cover. I was so sure I had it with me as I was carrying groceries, but now I can't seem to find it anywhere.