She gives a copy to each Scranton employee during the meeting where she introduces herself (Manager and Salesman).
Jim later uses his copy to play a prank on Gabe by using the book on tape version to string together sentences that sound like Jo insulting him (WUPHF.com).
In Season 7, Darryl, Dwight and Andy go to a bookstore (The Ultimatum). An entire row of copies are on display on the upper floor.
When Dwight goes down to Sabre's headquarters in Tallahassee to interview for a job, a large display case with several copies of the novel are seen in the background of the lobby (Trivia).