Here we don't write about the book (see below), but the philosophy. We take a modern rather an a purely historical perspective.
The best view of the historical perspective comes from Ward's writing. Ward explained much of how wiki worked in More About Mechanics.
# Recent thoughts
The wiki way, involves more than these simple hypertext concepts. It also involves more that a shift towards integrating the author. Wiki is more than a pencil. The aspect of wiki which is harder to capture with an engineering vocabulary are the concepts that speak to the social design.