Stevie Wonder is leading a campaign to translate billions of books into a readable format for blind people.
The Superstition hitmaker, who has been visually impaired since shortly after his birth, told the United Nations' World Intellectual Property Organisation that more than 300 million blind citizens do not have access to important science and history texts.
He is calling for a deal to encourage the trade in copyrighted books so they can be transferred into formats that are readable for the blind.
According to AFP, the Motown legend told delegates in Geneva, Switzerland, "What I would like to do today is launch what I call the 'Declaration of freedom for people with disabilities'. It's a call to action, a plan that will empower the independence of people with disabilities by providing them with the tools to learn and grow."