He is expected to comment on world events.
Bush also has a new book, "Decision Points." The book is set for release in November, and will be available to guests at the forum.
It's not an autobiography, Bush says, but an analysis of key moments in his life, including quitting drinking, Hurricane Katrina and invading Iraq.
Library officials say tickets for the main auditorium have already sold out. However, they have some remaining tickets for satellite viewing areas with large screen monitors.
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