A Great Ruby (Programming Language) Reference

A few years back I went through a free online book about Ruby (the programming language, not the stone). For a class I'm taking this semester I find myself needing to use Ruby, so I went in search of said reference book. Sad to say, the fellow who wrote it seems to have erased his online identity, including his copy of the book.
But not to worry, dear reader, I found a copy of the book in .pdf format and thought I'd share it with you (yes it's under the Creative Commons license).

Download Why's Poignant Guide to Ruby

I should mention that the author (why the lucky stiff), is somewhat insane; the book is strange, but awesome. I highly recommend it.