Who banned Are You There God It's Me Margaret book?

Are You There God, It's Me Margaret was banned by a number of school libraries for being "sexually offensive and amoral". It was removed from Gilbert, Arizona elementary school libraries. In

Xenia, Ohio school libraries, the book was challenged because of "sex and anti-Christian behavior." It was also banned in Zimmerman, Minnesota but the ACLU was able to reverse the ban and allow students to check the book out if their parents give permission.