This decision allows the library to provide warnings on materials that include historical denial and other contentious topics.

This ruling affirms that libraries can engage actively with media, offering both positive recommendations and critical notices.

The court determined that such denials classify the content as controversial, justifying the library's labeling practice.

Additionally, the court clarified that libraries are not required to maintain neutrality toward political parties but must adhere to factual objectivity, which it found satisfied in this case.

On April 15, 2025, the Münster Administrative Court ruled that the Münster City Library is permitted to label books containing controversial content with classification notes.

The court ruled that the warning notice does not infringe upon the author's fundamental rights, reinforcing the library's right to express critical views.

One of the authors whose book was labeled requested the removal of the notice, but the court rejected this appeal.

The decision is not yet final, as the author has the option to appeal to the North Rhine-Westphalia Higher Administrative Court in Münster.

Overall, the court's ruling underscores the balance between protecting free expression and providing critical context in public libraries.

The court emphasized that this labeling aligns with the educational mission of public libraries, which are mandated to provide critical content assessments.

Previously, in 2024, the library had labeled two books as containing controversial material, emphasizing their availability in support of censorship, freedom of opinion, and informational freedom.

The court's ruling was influenced by an author whose work denies well-documented historical events, such as the moon landing and the atomic bombings of Hiroshima and Nagasaki.