Fahrenheit is a dystopian novel by American writer Ray Bradbury , first published in Often regarded as one of his best works,  the novel presents a future American society where books are outlawed and "firemen" burn any that are found., The system was simple.
When the book was written, Bradbury got a copyright term of 28 years, renewable for another 28 years if he or his publisher wished. Most authors and publishers did not bother to renew — very few have a commercial life longer than a few years. The copyright was renewed and as a result it would have been entering the public domain tomorrow — January 1, — Public Domain Day. You could reprint it, make a low cost educational version, legally create a braille or audio book edition, even base a new film or play on it. All without asking permission or paying a fee.