Although most people associate Tunica today as a Casino town it has a history that delves deep into the time that the Tunica Indians lived and farmed these lands. Europeans came in and Tunica turned into a cotton producing city that saw the pain of many slaves. Reading up on Tunica will help you see the historical part of the town rather than just the slots! 

Where else to start but the beginning, check out "Mississippi: A History" by Westley F., Jr. Busbee, or  "The Emergence of the Cotton Kingdom in the Old Southwest: Mississippi, 1770-1860" by John Hebron Moore for some area enlightenment. For more information on the Tunica Tribe you can read "Indians, Settlers, and Slaves in a Frontier Exchange Economy: The Lower Mississippi Valley Before 1783" by Daniel H., Jr. Usner

A guidebook is a great idea for any destination and a good one for this region is "Insiders' Guide to Mississippi" by Sylvia Higginbotham, Lisa Monti, and Inc. Insiders' Guides. To do some fun exploring in the state pick up " Mississippi Off the Beaten Path: A Guide to Unique Places" by Marlo Carter Kirkpatrick.