Giuliani traveled to Simi Valley, Calif., Monday for his first semiofficial function as a member of the Reagan Foundation -- a private dinner with former first lady Nancy Reagan and board members, the New York Daily News reported.
Giuliani signed copies of his book, "Leadership," Tuesday at the Reagan Library, with proceeds from the sales dedicated to the Reagan Foundation.
The foundation sustains the Ronald Reagan Presidential Library & Museum, Center for Public Affairs and the Presidential Learning Center.
Giuliani was the No. 3 official in Reagan's Justice Department and called his appointment to the foundation's board "a great honor" and "something I would do whether I had a political future or didn't."