_pxkn

Seems like this is based on Google's own internal code search tooling, something most engineers at Google rely on for every day code-level work. I personally can't even begin to imagine how I'd navigate the gigantic codebase without it.

(I work at Google)

Steve Losh's post on how to learn Common Lisp is an amazing resource. I encourage people to check it out!

It happens to include many of the books mentioned in the parent post.

Link: http://stevelosh.com/blog/2018/08/a-road-to-common-lisp/

Accompanying HN discussion: https://news.ycombinator.com/item?id=17852194