A road to Common Lisp
This a really brief, yet really interesting, approach to introducing Lisp to someone. Interesting because it covers all the usual ground, but also has copious pointers to other material slightly-beyond-introductory (“Where to go from here”). It also links to material that’s essential to modern practice, such as Lisp packages and systems, and the essential “standard libraries” such as Alexandria, Bordeaux, CL-PPCRE, usocket, and the like: the things that are needed in practice and which in other languages would probably be built-in and included directly in an introduction.