A brand new book on the 31st Mass. has just been released in December 2019. The book is called A Yankee Regiment in Confederate Louisiana and it was authored by our own historian, Larry Lowenthal. The book is available from LSU Press and can be ordered online at:
https://lsupress.org/books/detail/yankee-regiment-in-confederate-louisiana/
Congratulations to Larry on this addition to the body of literature on the Civil War!