Though unlike other Lisps, it does have a functional focus. That is very fine with me, but YMMV.
I also wish I had more reasons to use/learn lisp. Everything I do is better suited to another language, it seems like.
http://www.cliki.net/ has a lot of useful resources for people who are just starting.
If you prefer a functional language(Common Lisp is multi-paradigm, and isn't particularly better at FP than say python) clojure and scheme are good options. I recently started reading Realm of Racket, which seems like a pretty good introduction to Racket(a scheme like language).
I recommend learning all 3 dialects, all of them deserve deep study and I strongly favor Common Lisp as the most mature and versatile one.
It's like buying someone a beer. That is only less than half full, because the barkeeper drank 60% of it.
So if you pay 10$ the author gets 8.50$. As a leanpub author myself, I find this arrangement very good. The only problem with leanpub I have is that the 45 day money back guarantee is too long, and if that period happens to end in the beginning of a month, you have to wait for the start of the next one in order to get paid(leanpub pays in the first 3 days of a month). I had to wait two months for my first payment. I'm not complaining, leanpub haven't wronged me in any way, and in fact I have benefited from people paying much more than the suggested price(15$ for my book, 5$ minimum price). Leanpub is a great service! I recommend more people republish their blogs or publish new material with it.