I would suggest you to read it before jumping to conclusions (as the new chapters will be published). Lisp will not be the main focus of the book, for those who don't plan to use it at work, it may be perceived just as pseudocode. As for Javascript, I believe that explaining algorithms using it is counterproductive as the language has too many limitations that will impede expressing everything I need idiomatically. I'm not saying that you can't program algorithms in JS, but it's not pleasant and productive. Besides, JS is not the language I'm interested in, at all