[pdelgallego]

You might enjoy Lisp in Small Pieces. Is one of my favorite books

The book is in two parts. The first starts from a simple evaluation function and enriches it with multiple name spaces, continuations and side-effects with commented variants, while at the same time the language used to define these features is reduced to a simple lambda-calculus.

The second part focuses more on implementation techniques and discusses precompilation for fast interpretation: threaded code or bytecode; compilation towards C. Some extensions are also described such as dynamic evaluation, reflection, macros and objects.

http://www.amazon.com/books/dp/0521545668

[mnemonik]

Great book, although I found it hard parse sometimes (compared to say the later chapters of SICP) which I suspect is because it is translated from french. Either way, it puts so much information in one place, it is incredibly valuable.

[Nzen]

If anyone's considering it, now is the time. I've watched it for the last five months. The used price almost always hovers at 80 dollars. It is currently 54 dollars. I'd buy it myself if it weren't just going to sit on my shelf, unopened, the next five months.