It would be simply awesome if you could order this book on-demand from the original publisher. If that were the case I would pay well for a fresh new copy. I have currently worked through the .pdf version available online ([...] and I can honestly say that this book is far better in content and, more importantly, in presentation than any other programming book I have eve read (and I have read many). After tiring from tinkering with languages such as Java (big and burdensome), C/C++ (great languages provided you like writing long, and I mean long programs, to get basic things done), C#/ASP (I hate Microsoft and will never go back) and PHP (a hack par non) I wanted to try another language that rekindled my desire to program. Enter Lisp (as well as Python, but that's another story) and Professor Touretzky's book. I tried Graham's On Lisp but found it too pedantic and verbose (maybe later), I tried Steele's Common Lisp (good but misses the mark for beginners), I tried Seibel's Practical Common Lisp (good but remind me of a Murach hack book on how to program in XYZ with little emphasis on presenting the actual language and more on hey dude here's a cool program), I tried Barski's Land of Lisp (similar to Seibel in that it's cool if you like little explanation of the language with major emphasis on just cut and paste programs), then I came across Touretzky's Common Lisp and now I love the language. The material is presented in a sound logical and user-friendly manner and, more importantly, Touretzky explains the ins-out and how-to's of the language using carefully crafted examples, exercises and well laid out diagrams. If you want to learn a language that will awaken you and teach you how to think about programming in a new light, then I highly recommend reading this book. If you come from another language or languages, you should be able to work through this text in a relatively short period of time and, after this, move on to other books or resources. After this I would recommend Steele's, then Graham, and then Keene (I am currently working through the latter two).
Bottom-line - do your self a favor and buy a used copy or lobby the publisher to provide it on-demand.