* The World Wide Web: This is a vast and constantly evolving collection of interconnected websites and resources. It doesn't have a fixed number of pages, as new content is added every second.
* A specific book: You might be thinking of a particular book with the word "Web" in the title. If you can tell me more about the book you're interested in, I might be able to help you find the number of pages.
Please provide more context so I can answer your question accurately.