Audio books are a great way to enjoy and share literature. Project Gutenberg no longer adds new audio books to the collection, and suggests these audio book resources. These audio books are all freely available and in the public domain in the US. They may be easily played back on computers, tablets, mobile phones, and other devices. They may be shared non-commercially, without limitation except in countries where the printed source is still copyrighted. All of the sources listed below are digitizations of texts from Project Gutenberg., Open Library is an open, editable library catalog, building towards a web page for every book ever published. Read, borrow, and discover more than 3M books for free., PDF Drive is a free service to download educational and recreational PDF books. Users can search for their desired topic, download and read it online or offline.