POP-UP. STAIRS by Rein Jansma. no pl.:Joost Elffers Production . 4to, blind stamped linen covers, Fine in sl. worn cardboard case. A fascinating pop-up with no text at all but which consists of 10 different configurations of pop-up stairs with the appearance of being executed from one continuous piece of accordion folded stiff paper. This was Jansma's only pop-up book, conceived while he was bedridden from an illness. Very different.