This is a secure purchase site and you can have a specified number of additional downloads to obtain the latest update, for a period of up to a specified number of months.
The eBooks are protected PDFs, but you can use it to print a paper copy for your use and to make notes on.
You can purchase and download within a couple of minutes time.
The eBook link leads to my (Lulu) Book Store home page, where there are more books and some freebees.
Advantages of Digital Books.
My eBooks in PDF format contain links to external web sites which you can jump to by clicking on the links in the book.
The left side panel contains bookmarks which allow jumping to the topic.
The PDF readers have an excellent search feature by which you can quickly find any word or phrase.
There will be more eBooks and pamphlets in the coming months.
There will be color pictures in some of the offerings.
The pamphlets are no nonsense documents with few pictures, but lots of detailed information.
I am interested in comments and feedback.