Got this book from Cheshire Libraries when I was trawling through the book list for anything to do with Salerno. It's subtitled Sicily and Salerno 1943 with 41 Royal Marines Commando. It's a great account at an individual marine's level of the actions of the commando and gives a good feel of the terrain involved. At one point the commando is heavily attacked on Black Monday, but the sector he was on was quiet and Captain Stott the troop commander was killed when he led a counter attack when the Germans broke through to Dragonea.
Here's my commando unit that I'll be using in the game as 41 (RM) Commando