All are excellent. I'd only add the SIU essay collections (which include Tim's excellent essay on the Big Black River Bridge fight)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
I need to place my order. It would be a nice birthday present and finish his trilogy on Vicksburg----plus an additional one on Grierson's Raid which occurred during the campaign.The Siege of Vicksburg: Climax of the Campaign to Open the Mississippi River, May 23 - July 4, 1863 - Due out June 5, 2021
@Lincoln56 listed them above.What book is part of this series other than the Assaults in May?