Dayum - again?! That's nuttier than a squirrel turd.
I won't lie - I've bought a pile of books at GW and put the one or two "special price" books on the bottom...knowing they probably won't look at them individually and just ring them all up as adult hardbacks. If they notice, I pay. If they don't, I still pay (regular prices). BUT, they have all been books on quilting and sewing, which I gifted to my mom, so hopefully that atones for my sins.
This one was regular price at $2.92, ended up selling for a bit more: