I figure everyone here already has these books, but hey, they make super gifts! Who's mom wouldn't enjoy a copy of THE DEVIL YOU KNOW for Mothers Day?
UPDATE! Holy cake! YELLOWBELLY AND PLUM GO TO SCHOOL is also on sale for $6.80! Now that is a steal! Yellowbelly's been getting harder to find, and I can't imagine they have many at that price. I think I'm going to buy a few. Hot diggity! (Thanks for the tip, Anonymous poster!)
You could get all three books for under $20!!!