S.P.E.C.T.R.E

 I was contacted by "C".They needed me to make  false books, around 2 wooden blocks for use as "levers", which when pulled from the shelf as shown, facilitate the opening of a secret passage way, leading from a library to a secret office.
All I know is, is that its for a private client at an undisclosed location in nevada.
I will try to obtain footage of its operation, but it will not be easy.