You'll have to tell us a great deal more about your workflow for us to help.
Are you creating the 20-page book, or are you opening someone else's file? What do you mean the pages "don't show up"? Are they blank? Does the file not open? Is there an error message?
Are you using the latest version of InDesign CC 9.2?
Yes Hi, as I said, when starting a 20 page book... the pages do not show up. The file opens, but the pages of the file do not. Theyre not there. Basically, there is nothing on the board.
I just downloaded the 9.2 version of CC
The pages would be blank if you haven't put anything on them.
What are you seeing? Make a screen capture. Use the "camera" icon in the forum editor to attach it.
Have you read anything or viewed a video about how to get started in InDesign? Here is a link to video tutorials which might help you: