MIT gives this book away for free in electronic format--just google the title. When I took this course, I just printed out the chapter I needed or read it on my computer screen. Why pay for the book when the authors give it away for free? Having an electronic version is also helpful because when they reference earlier problems and sections in the book, they usually link to it for easy navigation. Also, you can copy and paste code from the text with an electronic version as opposed to transcribing it yourself, which I found to be VERY helpful. Good luck with LISP!
> Why pay for the book when the authors give it away for free?
I'd say the reason to pay for it is to thank and the authors for putting together such an enlightening book. By all means go and download it, but if you like it do consider buying a copy to reward them for their efforts.
Plus, a hard copy beats reading off a computer screen. At least for me...
If you want it for Kindle, I just converted it (it's under a Creative Commons license, so it's completely legal to do): http://www.amyandkevin.net/sicp/sicp.zip. I bought this book back in college, but my wife accidentally sold it back to the book store (I think I paid retail in 1993 of $70, and no doubt the rotten univ. bookstore only gave me $30 for it...)