Learn C and build your own Lisp
if you really want to learn to build lisp, please lookup "lisp in small pieces"
<a href="http://www.amazon.com/Lisp-Small-Pieces-Christian-Queinnec/dp/0521545668" rel="nofollow">http://www.amazon.com/Lisp-Small-Pieces-Christian-Queinnec/d...</a>