a handwritten or printed work consisting of pages glued or sewn together along one side and bound in covers.
As a noun, the movement of this sign is formally twice. However, the movement may be once in effect of phonological co-articulation even if it's noun in sentence.
Gloss: /\BOOK/\ MY UNCLE IX1 CL:LAY-DOWN ON-CL:SURFACE.
English equivalent: My uncle lays down the book.
See that there is more than one sign (handshape) for "to lay" or "to lay down"? It's a classifier of the sign LAY-DOWN for a book.
See LAY-DOWN for a regular, base sign (non-classifier).