Hitchhikers guide to the Internet. - Ed Krol (RFC, 1989)

FYI on "What is the Internet?". - Ed Krol; Ellen Hoffman (RFC, 1993)

The whole internet - user's guide and catalogue (2. ed.). - Ed Krol (O'Reilly, 1994)

The whole internet for Windows 95 - user's guide and catalog: covers internet explorer. - Ed Krol; Paula M. Ferguson (O'Reilly, 1995)

The whole internet - the next generation. - Kiersten Conner-Sax; Ed Krol (O'Reilly, 1999)

FYI on Questions and Answers - Answers to Commonly Asked "New Internet User" Questions. - Raymond Plzak; Amy Tracy Wells; Ed Krol (RFC, 1999)