The Ed Bearss trilogy (which you mentioned) is still the gold standard in my opinion despite being 30 years old now.
Ninety-Eight Days: Geographers View the Vicksburg Campaign by Warren E. Graubau
This is currently out of print and has become hard to find, there are 68 maps
Vicksburg: Grant's Campaign That Broke the Confederacy by Donald L. Miller
Vicksburg is the Key: The Struggle for the Mississippi River By William L. Shea
Everything listed below is not a one volume study of the entire campaign but thought you might be interested.
Any Book by Timothy B. Smith:
Champion's Hill: Decisive Battle for Vicksburg
The Decision Was Always My Own: Ulysses S. Grant and the Vicksburg Campaign
The Union Assaults at Vicksburg: Grant Attacks Pemberton, May 17-22 1863
The Siege of Vicksburg: Climax of the Campaign to Open the Mississippi River, May 23 - July 4, 1863 - Due out June 5, 2021