Classic? SICP and PAIP are the only two I'd really consider classic. The Reasoned Schemer is 2005 and is IMO the most important introductory text on relational programming since Warren's Abstract Machine: A Tutorial Reconstruction. ~200 lines of Scheme and you have something as fast Prologs written in 150K of C.
I don't consider Art of the Metaobject Protocol to be introductory or conceptual. Alan Kay considered it one of the only interesting books published on object oriented programming for a decade! Lisp in Small Pieces is also not particularly introductory or conceptual - that's a hardcore compiler optimization text.
I'd love to hear of a domain where a Lisp dialect isn't as well suited as anything else.
I don't consider Art of the Metaobject Protocol to be introductory or conceptual. Alan Kay considered it one of the only interesting books published on object oriented programming for a decade! Lisp in Small Pieces is also not particularly introductory or conceptual - that's a hardcore compiler optimization text.
I'd love to hear of a domain where a Lisp dialect isn't as well suited as anything else.