Why did the catholic church try to censor books?

The church was welcoming to the ideas of the Renaissance

It was a reaction to the Renaissance's new freedom and societal rebirth

The Catholic Church tried to censor ideas that it considered a threat to people's morality

and to its own power and authority. They sought to maintain control over the thoughts and beliefs of the people, as well as to protect their own doctrine from being challenged or undermined by alternative viewpoints. Censorship was seen as a way to suppress dissent and maintain the status quo of the church's teachings and influence in society.