The Hitchhiker's Guide to the Internet (1987)
gutenberg.org
gutenberg.org
Clearly they didn't date well, but his books along with the "Unix and Linux System Administration Handbook" (I had the red one, not sure which edition), set down the foundation for me.
Off the back of those I ended up going down a path as a Senior Engineer at one of the UK's largest ISPs and then getting back into development in the Internet industry ever since.
I owe a lot to Ed Kroll, amongst many others. Great to see this released through PG.
Good read, thanks for posting this.