Welcome aBoard, kummini, and please say hello to sweet Avy if you get the chance.

Musick, I think 'no book' or 'no books' depends on the context.
Ex.: "I looked on the shelf where you told me to, but there was no book there". Or, say, an art teacher whose awaited manual on framing did not come in when expected, would have to tell his class, "I was going to show you xyz
technique, but I have no book". But if there was a shipment of textbooks for the students that had been delayed, then they would have no books.