[telemachos]

Roberto Ierusalimschy's Programming in Lua[1] comes to mind. (The link is to the freely available first edition. There's a second edition available that covers more recent versions of Lua.) (Whoops - apologies to brianm - he beat me to this, but I didn't notice.)

Maybe also Graham Hutton's Programming in Haskell[2]. It's certainly wonderfully concise and dense (you meet a simple Haskell quicksort in the second chapter, as I recall), but I have to admit that I haven't had a chance to finish it.

One more: The AWK Programming Language[3] by Alfred V. Aho, Brian W. Kernighan, and Peter J. Weinberger, but that's almost cheating since one of the authors is K from K&R.

[1] http://www.lua.org/pil/

[2] http://www.cs.nott.ac.uk/~gmh/book.html

[3] http://cm.bell-labs.com/cm/cs/awkbook/