We read "the book" on how to see Disneyworld before we went some 25 years ago, I agree it was a help.  It was funny to recognize who had and who had not read "the book".  We could tell based on their behavior, such as the instructions to get there at the gate before opening, and go to the right instead of the left.  Most actually did go left, those who read "the book" went to the right and didn't get into crowds.  I forget the rest of the instructions, but it was funny to meet the same faces doing the same things based on what we read in "the book".