The United Nations Educational, Scientific and Cultural Organization (UNESCO) says that some of the world’s most controversial books should be banned from schools and libraries.

The organization said on Friday that “controversial texts are banned from the public library and from bookshops”.

“There are some books which contain violent, abusive, or even violent threats,” said the UNESCO website.

“But, in the case of some books, there are many positive messages and messages of hope, peace and social justice.

They also contain a lot of love, love of nature and hope.”

The list of banned books was published by the UN’s cultural organisation UNESCO, the world body which enforces the global treaty that established the organisation.

In addition to books banned in schools and classrooms, the UN said that books should not be shown to children on the internet and that teachers should avoid having students read them.

“The content of these books is of grave concern, not only for the victims of child sexual abuse, but also for the wider community, for which they are a teaching tool,” said UNESCO in a statement.

“A good education and a free society depend on the open exchange of ideas and a healthy respect for the right to freedom of expression.”

It was the second year in a row that the UN had called for the removal of books on sexual abuse from schools.

In April last year, the agency warned that books which “distort or undermine the truth about child sexual exploitation” were “not suitable for the education of children”.

The UN also said it had issued new recommendations for schools to remove books on child sexual harassment and violence from their curriculum.

In September last year it also said that it wanted to ban books on sex trafficking.

“These texts promote sexual exploitation of children, often in very explicit and graphic ways,” it said.

“They also depict abuse, exploitation and violence in a way which is inappropriate and can cause harm to children.”

In April, the United Nations called for an end to books “towards the sexual abuse of children” and for more information on sexual violence.