Downloadable Books

At the bottom of this page in the sub pages you will find downloadable PDF files which are provided for educational purposes. I have downloaded them from various sources on the internet and in these uncertain times it seems wise to make them available on a multitude of sites.  I would encourage anyone who feels that they are enriched by the books to purchase hard-copies if they exist. Many of them are available from Amazon.com and when other sites are known I have included them on the download page.