On the websites below, you may read the book online and there is one place you can buy it used or new.

Amazon
https://www.amazon.com/Handbook-personal-evangelism-Ray-Stanford/dp/1564530973

Bible Line Ministries
http://www.biblelineministries.org/onlinebooks/handbook-of-personal-evangelism/

Free Grace Resources
http://www.freegraceresources.org/pebook.html

Jesus is Precious
http://www.jesusisprecious.org/books/ray_stanford/pehandbook.pdf

Ephesians 289
http://www.eph289.com/peinfo.html
http://www.eph289.com

Heritage Bible Baptist Church
http://heritagebbc.com/wp-content/uploads/2015/02/pehandbook.pdf

Solid Rock International Ministries
http://www.srim.cc/cppebook.html