Here is the link to the library's site:
http://www.mercantilelibrary.com/I phoned them (513-621-0717) and was told tickets are still available. You may purchase them over the phone using Visa/MC (or in person at the library). Tickets are $175 for non-members/$150 for members. Wednesday will be the last day to purchase tickets (because dinner is included).
The event is at 7 pm 10/28 in the Presidential Ballroom of the Westin Hotel in Cincinnati.