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Erle Stanley Gardner’s works (including the Perry Mason series) remain under copyright protection in most jurisdictions. For example, in the United States, works published after 1928 are generally protected for 95 years from publication. Many Perry Mason novels were published in the 1930s–1960s, and only a small minority have entered the public domain. Unauthorized downloading or distribution of copyrighted PDFs is illegal in most countries. erle stanley gardner - perry mason books pdf free download