A free online book called Purify Yourself by Pastor Paul Rika is very important for those who want to sanctify themselves in readiness for Christ’s return:
http://www.holinessrevivalmovementw...16/12/Purify-Yourself-by-Pastor-Paul-Rika.pdf
http://www.holinessrevivalmovementw...16/12/Purify-Yourself-by-Pastor-Paul-Rika.pdf