University of Tennessee Press
For those Civil War historians who read Ed Bearss's superb works on the Vicksburg campaign and thought that no important details of this watershed action remained to be discovered, Warren Grabau's Ninety-Eight Days: A Geographer's View of the Vicksburg Campaign will provide a delightful surprise...
Butts, Kent Hughes & Arthur L. Bradshaw
"Lay Of The Land: Knowing The Terrain Aided Grant's Capture Of Vicksburg,"
Civil War Book Review: Vol. 3
Available at: https://digitalcommons.lsu.edu/cwbr/vol3/iss1/34