why's (poignant) guide to Ruby: in color cover
why's (poignant) guide to Ruby: in color
by why the why the lucky stiff
ISBN: 1512212938
Buy on Amazon
Found in 1 comment on Hacker News
holyjaw · 2015-05-25 · Original thread
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/1512...

2: http://www.amazon.com/whys-poignant-guide-lucky-stiff/dp/151...