In LINKcat member library collections. Ziglar is getting a bit of a bounce at Amazon.
2 copies of what's cataloged as a revised and expanded edition (1977) in LINKcat: Baraboo, Portage. There are 51 library locations in LINKcat, including the 8 branches of the Madison Public Library.
3 copies of the 25th anniversary edition (2000) in LINKcat: Ashman (Madison), Pinney (Madison), Reedsburg.
A LINKcat author search for Zig Ziglar results in 35 hits. A number of the records have just 1 holding attached.
Zig Ziglar New York Times obituary.
Although I've never read any of Ziglar's books, I have to say these "9 Steps to Get to the Top" very much reflect the way I live my life.