The Open Library (openlibrary.org) is a fantastic resource. It is a project of the non-profit Internet Archive that aims to create "one web page for every book ever published." Because the Perry Mason books are still in copyright, the Open Library uses a controlled digital lending system (much like a physical library). You can search for titles like The Case of the Velvet Claws and, if available, "borrow" the eBook for a set duration. You may need to create a free account, but it is a legitimate way to access the text without downloading illegal copies.
Erle Stanley Gardner was not just a prolific writer; he was a practicing trial lawyer in California for over twenty years. This real-world legal experience provided the groundwork for his fiction. erle stanley gardner - perry mason books pdf free download
He frequently uses dramatic courtroom stunts to expose the real killers. The Open Library (openlibrary