Okay, I just want to start by saying that even I know this idea could easily nosedive into oblivion, but here goes.
The object is a black leather-bound book, 1000 pages long, no writing on the cover, spine or back.
Holding the book while closed and thinking of a number will cause the page the book is opened at to be that number page, with all preceding and following pages within the 1000-page limit included. The contents of the book is essentially all information in the universe, ranging from encyclopedic entries on objects people and places, to full transcripts of the entirety of a person's speech, actions and according emotions within their lifetime (including those of aliens, maybe). The actual number of pages exceeds the billions. Naturally, the book will be restricted to access of O5 personnel following a unanimous vote to use the book for a specific cause, and contained within a dedicated site with no researchers or doctors, only guards misinformed of the SCPs nature to prevent containment breach, as further secured by a last resort nuclear warhead defense system.
I realize that the Mary Sue horse has been saddled and thoroughly ridden by this SCP already, but I'm hoping suitably strict containment procedures and some insight on how I can limit the powers of the book may yet reign that troublesome mare in. Your thoughts?