There are a couple of places you can turn!

For a series of specific works there is the 3 volumes that were published in the last 20 years on WW2 through early Cold War Mine Warfare vessels by Commander David Bruhn, USN (Ret) who was himself a career Mine Warfare man. His works and contributions in a very scanty field of literature is nicely summarized here: http://www.navyhistory.org/2012/04/remembering-contributions-mine-warfare-community/

For some more general histories of the Pacific War you have a few places to turn. My personal go to is the new trilogy beginning with Pacific Crucible by Ian W. Toll though his 3rd volume is still in the works.

Alternatively you can always take a look through the official USN reports on the various campaigns. For instance this is the consolidated reports on the war made in 1946 by CNO Admiral King and includes a general overview of the war and its various phases. https://www.ibiblio.org/hyperwar/USN/USNatWar/index.html

There is also the very detailed daily chronology of USN operations in WW2. http://www.ibiblio.org/hyperwar/USN/USN-Chron.html

The semi official histories of Samuel Elliott Morrison is similar to these and is also pretty widely available, but to be frank outside of general reference isn't something I put a ton of stock in and hasn't always aged well.

There are also many command histories out there such as this one for the 7th Amphibious Force in the war. This was the amphibious contingent of 7th Fleet which was formed to augment the Allied drive through the South Pacific under MacArthur in Hawaii in parallel with the 3rd/5th Fleet drive through the Central Pacific. https://www.history.navy.mil/research/library/online-reading-room/title-list-alphabetically/s/seventh-amphibious-force-command-history1945.html

While finally if I might be so bold there is a work of historical fiction I would be remiss if I did not mention. That is The Caine Mutiny winner of the 1952 Pulitzer Prize by Herman Wouk who spent the war as an officer aboard a pair of Destroyer Minesweepers and rose to become XO of one. It paints one of the most true to life pictures of the experience of life aboard a USN warship in WW2, and of the Mine Warfare community in general. With particular attention to the huge numbers of missions the converted old destroyer does that ARENT sweeping mines. To understand a little bit about what your Grandfather's experience might have been like with just some seasoning of fiction.