Amazon offers My Weird School 21-Book Box Set for with free shipping.

Product Description:
Ella Mentry School is just plain weird! From a principal who kisses pigs to a teacher who wears dresses made of pot holders, A.J. and his friends have had some wacky adventures. Now fans can have all twenty-one books in the bestselling My Weird School series on hand!
This box set includes:
#1: Miss Daisy Is Crazy!
#2: Mr. Klutz Is Nuts!
#3: Mrs. Roopy Is Loopy!
#4: Ms. Hannah Is Bananas!
#5: Miss Small Is off the Wall!
#6: Mr. Hynde Is Out of His Mind!
#7: Mrs. Cooney Is Loony!
#8: Ms. LaGrange Is Strange!
#9: Miss Lazar Is Bizarre!
#10: Mr. Docker Is off His Rocker!
#11: Mrs. Kormel Is Not Normal!
#12: Ms. Todd Is Odd!
#13: Mrs. Patty Is Batty!
#14: Miss Holly Is Too Jolly!
#15: Mr. Macky Is Wacky!
#16: Ms. Coco Is Loco!
#17: Miss Suki Is Kooky!
#18: Mrs. Yonkers Is Bonkers!
#19: Dr. Carbles Is Losing His Marbles!
#20: Mr. Louie Is Screwy!
#21: Ms. Krup Cracks Me Up!