It didn't appear that Let over Lambda was free either, just some select chapters at the bottom of the page.
If you click on "Table of Contents" (http://letoverlambda.com/index.cl/toc) the author gives access to the first 6 chapters with only 2 non published online. Which I think is great, I've been considering buying this book for a while but was afraid it would be too far over my head. Now I get to find out first.
Let Over Lambda is amazing and I highly recomend it for those that would like to know just what you can do with Lisp macros. It builds on the work in On Lisp, but you can get by without reading it first.
