1 - (121) - Dive into THE FORCED INDENTATION OF CODE
2 - (116) - Structure and Interpretation of Computer Programs
3 - (59) - Real World Haskell
4 - (50) - On Lisp - Paul Graham
5 - (41) - Practical Common Lisp
6 - (41) - Why's (Poignant) Guide to Ruby
I guess the Sussman was right to discontinue teaching 50's retrocomputing.