You are a programmer: your primary responsibility is problem understanding, searching the solution-space and evaluating your options.

Even an automaton like the Google algorithm can search data and correlate them. When I type "Common" it auto-completes "Lisp". You should be able to search, find, and compare technologies on their own merit.

The entire programming fora are burning with altruistic recommendations for free Lisp books, some of them classics of the field.

Just pick one of them randomly. Once you know enough about the language, you will be able to choose the implementation that better suits your needs.