I believe there are 9 books
I read the books when i was a kid. I think there are 28 books
There are currently 10 "Too Ghoul for School" books in the series by B. Strange.
51 But They Are About To Make A 52nd
There are two books in the series.
There are 4 books in the series.
There are 31 books in the "My Weird School" series written by Dan Gutman. Each book features humorous stories centered around the wacky adventures of students and teachers at Ella Mentry School.
There are currently 5 books in the series.
There are eleven books in that series
There are 6 books in this series.
There are three Wayside School books written by Louis Sachar. They are "Sideways Stories from Wayside School," "Wayside School is Falling Down," and "Wayside School Gets a Little Stranger."
27.5 is a lot of books in the series i think the correct answer would be 15 books in the series