A library ladder is a type of ladder specifically designed to be used in libraries. It is tall with wheels and often has steps or rungs where people can stand to reach high shelves or books. Full definition
You need to design a rolling library ladder / staircase that would be flat against the wall until needed. (theletteredcottage.net)
The kitchen will leave you amazed with its many custom designs, which include a custom island and library ladder in both the kitchen and pantry — and what a pantry! (homebunch.com)
P.S. Yes, that is our new library ladder we installed during our recent home facelift! (gnomelover.com)