I was reading a reprint of Paul Graham’s ANSI Common Lisp in Borders yesterday, so I thought I’d see if it were available yes on Amazon (which it is… sorry, Borders); I idly thought I’d see if any copies of Paul’s On LISP were floating around…
Amazon.com: Used and New: On LISP: Advanced Techniques for Common LISP
Well, yes. If you want to spend between $200 and $400….
Incidentally, the book is available in postscript or PDF from Paul’s own site.

