What's the difference between the Red book [1] and the Black book [2]? 1: http://www.amazon.com/whys-poignant-guide-Ruby-color/dp/1512212938 http://www.amazon.

What's the difference between the Red book [1] and the Black book [2]? 1: http://www.amazon.com/whys-poignant-guide-Ruby-color/dp/1512212938 http://www.amazon.com/whys-poignant-guide-Ruby-color/dp/1512... 2: http://www.amazon.com/whys-poignant-guide-lucky-stiff/dp/1511878037 http://www.amazon.com/whys-poignant-guide-lucky-stiff/dp/151...