I got a lot out of "Essentials of Programming Languages" (2nd edition, at the time) by Friedman, Wand and Haynes. It has a great quote from Hal Abelson in the

I got a lot out of "Essentials of Programming Languages" (2nd edition, at the time) by Friedman, Wand and Haynes. It has a great quote from Hal Abelson in the foreword, too: > Perhaps the whole distinction between program and programming language is a misleading idea, and future programmers will see themselves not as writing programs in particular, but as creating new languages for each new application.