Sorry for the wait. Ended up being a rather loooong 9 holes... and then dinner.
Here's the books I use:
"Autolisp Programming: principles and techniques" by Rawls
Pretty decent intro stuff. Kinda 'text-booky' (exercises, and stuff) r13 i think.
"Autolisp in plain english for non programmers" by George o. Head
Out of print, but available at discount clearing houses. (re)Search amazon
r12ish but very nicely written. Easy to grasp stuff with this one.
"The Autocadets guide to visual lisp" by Kramer
r14 based (?) A pretty good one to get to know your way around the vlide.
Still reading these. I usually want to dive into a routine that I need, and use these as references, but probably a better strategy would be to work through the examples as I read thru the books. I think stuff would prolly sink in better that way. YMMV.
Hope this helps. Others may have different opinions on these authors.