I loved this book as a child. I even have an autographed version I got when Norton Juster visited Seattle.
I remember being in 4th or 5th grade and going into my school's library. I know exactly what shelf this was on seeing it between all the thin books-- The Phantom Tollbooth--the fattest book on that shelf.
I remember deciding that I must read this book.
I did and it has been one of my favorite books since then.
I just learned a couple days ago on NPR that, Norton Juster has reconnected with his illustrator and now have a new book out!