Given the new podcast focus on Vicksburg, there is a timely post on ECW today about Tim Smith's recent Vicksburg work The Union Assaults at Vicksburg.
The book provides a great deep dive on the failed May 19 and 22 assaults at Vicksburg. I enjoyed the read and recommend the book, though might not recommend if you have not read anything else about Vicksburg. The overall campaign is quite significant in scope and time, so it would probably help to take a look at the the high level before diving into the May 19 and 22 assaults. There is much to unpack in the campaign moving through Grant's attempts to get across the Mississippi to Vicksburg, the eventual crossing below Vicksburg, battles at Port Gibson, Raymond, Jackson, Champion Hill, Big Black River Bridge and then eventually Vicksburg itself.
The best overall work, in my opinion, is the Ed Bearss trilogy if you can get your hands on it and really want to dive deep. Savas Beatie is doing a reprint. The originals can be expensive, I had to get a used set online. In smaller works former park historian Terry Winschel has some collections of essays published in book form, Donald Miller's recent Vicksburg: Grant's Campaign That Broke the Confederacy, and Michael Ballard's Vicksburg Campaign are good. Warren Grabau's Ninety-Eight Days is an interesting look bringing Grabau's background as a geologist to the campaign study. Grabau has some great topographic maps in the book and worked with Bearss in his time researching and writing the book.