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).
Another appearance in season 7 is when Darryl Dwight and Andy go to a bookstore in episode Ultimatum. When they go up stairs you can see an entire row of copy's on display.
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).