Youve seen the documentary film An Inconvenient Truth. Now meet the author: global-warming lecturer (among other things) Al Gore in Memphis. Hell be signing at Davis-Kidd Booksellers on Monday, July 31st, at 5 p.m. (Sorry, no personalized autographs and no posed photography.) Youll need a ticket for this event. Get one by purchasing the book An Inconvenient Truth (Rodale Press). Those tickets are available beginning Saturday, July 29th, at 9 a.m. For more info, call the Davis-Kidd at 683-9801.