Dr. Seuss Enterprises has announced that it will stop publishing six books by Dr. Seuss author Theodor Geisel because they contain racist and insensitive imagery.

Geisel spent much of his life in La Jolla and is the namesake of UC San Diego’s main library, which is currently celebrating its 50th anniversary.

“These books portray people in ways that are hurtful and wrong,” Dr. Seuss Enterprises told the Associated Press in a statement that coincided with the late author and illustrator’s birthday. “Ceasing sales of these books is only part of our commitment and our broader plan to ensure Dr. Seuss Enterprises’ catalog represents and supports all communities and families.”