Zed Shaw wrote "Learn Python The Hard Way", and then E. Martin started to write "Learn Ruby The Hard Way", without asking permission to copy the text. There's

Zed Shaw wrote "Learn Python The Hard Way", and then E. Martin started to write "Learn Ruby The Hard Way", without asking permission to copy the text. There's a second book, started before LPTHW and LRTHW, called Learn You The Ruby, by me. But I haven't finished it :(