Here are some you don't have listed:<p>Mr. Neighborly’s Humble Little Ruby Book:<p><a href="http://www.humblelittlerubybook.com/book/" rel="nofollow">http://www.humblelittlerubybook.com/book/</a><p>Why’s (Poignant) Guide to Ruby:<p><a href="http://mislav.uniqpath.com/poignant-guide/" rel="nofollow">http://mislav.uniqpath.com/poignant-guide/</a><p>Think Python (Or: How To Think Like A Computer Scientist):<p><a href="http://www.greenteapress.com/thinkpython/thinkpython.html" rel="nofollow">http://www.greenteapress.com/thinkpython/thinkpython.html</a><p>and my own (still in early alpha): <a href="http://learnyouanrubyforawesomepower.info" rel="nofollow">http://learnyouanrubyforawesomepower.info</a> or <a href="http://learnyouanruby.com" rel="nofollow">http://learnyouanruby.com</a> once I get some free cash :o