Mobile - scroll down Building a Man-to-Man Defense

On Amazon.com - Building a Man-to-Man Defense (the Art and Science of Coaching Series) by Bob Huggins.
This is an excellent booklet for teaching all the details of man-to-man defense. This includes not only the usual "on the line, up the line" descriptions, deny, helpside, etc., but also how to bump the cutters, handle screens, etc. Numerous breakdown drills are provided for teaching each important aspect.