Dan Gutman 
My Weird School #20: Mr. Louie Is Screwy! 

With more than 30 million books sold, the My Weird School series really gets kids reading!In the twentieth book in the My Weird School series, something groovy is going on! It’s Valentine’s Day! And Mr. Louie, the hippie crossing guard, put a love potion in the water fountain. Now teachers are flirting with each other! Girls are asking boys out on dates! Will A.J. have to kiss Andrea? Not if he can help it. Yuck!Perfect for reluctant readers and word lovers alike, Dan Gutman’s hugely popular My Weird School series has something for everyone. Don’t miss the hilarious adventures of A.J. and the gang.