The Titanic Remembered: 1912-2012 by Beau Riffenburgh. "Unsinkable": The Full Story Of RMS Titanic by Daniel Allen Butler.
Gilded Lives, Fatal Voyage: The Titanic's First-class Passengers And Their World by Hugh Brewster. Farewell, Titanic: Her Final Legacy by Charles Pellegrino.
Return to Titanic: A New Look At The World's Most Famous Lost Ship by Robert D. Ballard with Michael S. Sweeney. Titanic: The Tragedy That Shook The World: One Century Later from the editors of Life.
Still not enough? Check the library's catalogue for more materials about the Titanic.