The American Library Association (ALA) released its 2015 list of the 10 “most challenged” books on Monday.

The ranking is based on 275 challenges, meaning “a formal, written complaint filed with a library or school requesting that a book or other material be restricted or removed because of its content or appropriateness,” the ALA’s Office for Intellectual Freedom (OIF) said in a statement, as part of an annual report on the “State of America’s Libraries.” A challenge doesn’t necessarily mean the book was censored, with outcomes varying per school.

Below is the full list, including complaints about each title:

Looking for Alaska, by John Green

Reasons: Offensive language, sexually explicit, and unsuited for age group. Fifty Shades of Grey, by E. L. James

Reasons: Sexually explicit, unsuited to age group, and other (“poorly written,” “concerns that a group of teenagers will want to try it”). I Am Jazz, by Jessica Herthel and Jazz Jennings

Reasons: Inaccurate, homosexuality, sex education, religious viewpoint, and unsuited for age group. Beyond Magenta: Transgender Teens Speak Out, by Susan Kuklin

Reasons: Anti-family, offensive language, homosexuality, sex education, political viewpoint, religious viewpoint, unsuited for age group, and other (“wants to remove from collection to ward off complaints”). The Curious Incident of the Dog in the Night-Time, by Mark Haddon

Reasons: Offensive language, religious viewpoint, unsuited for age group, and other (“profanity and atheism”). The Holy Bible

Reasons: Religious viewpoint. Fun Home, by Alison Bechdel

Reasons: Violence and other (“graphic images”). Habibi, by Craig Thompson

Reasons: Nudity, sexually explicit, and unsuited for age group. Nasreen’s Secret School: A True Story from Afghanistan, by Jeanette Winter

Reasons: Religious viewpoint, unsuited to age group, and violence. Two Boys Kissing, by David Levithan

Reasons: Homosexuality and other (“condones public displays of affection”).

Get The Brief. Sign up to receive the top stories you need to know right now. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Write to Olivia B. Waxman at olivia.waxman@time.com.