Presents brief reviews of new and noteworthy paperbacks for the week of May 25, 1997. `Jack Gance,' by Ward Just; `Tom: The Unknown Tennessee Williams,' by Lyle Leverich; `Paper Wings,' by Marly Swick; ``Worse Than Slavery': Parchman Farm and the Ordeal of Jim Crow Justice,' by David M. Oshinsky; `The Book of Secrets,' by M.G. Vassanji; `Orson Welles: The Road to Xanadu,' by Simon Callow; `The Game of Kings,' by Dorothy Dunnett; Others.