For completeness, SICP in .mobi format for Kindle: https://github.com/twcamper/sicp-kindle

I'm pretty sure there was a link to it from Dennis ritchies' home page:

http://www.cs.bell-labs.com/who/dmr

The site is down now though. Some forums say it's temporary but I don't know for sure.

Google: Kernighan Ritchie filetype:pdf