The Despatches
1. Viscount Alexander's Despatch on the Conquest of Sicily, 10 July to 17 August, 1943
2. Admiral of the Fleet Sir Andrew Cunningham's Despatch on the Invasion of Sicily
3. Admiral of the Fleet Sir Andrew B. Cunningham's Despatch on the Landings in the Gulf of Salerno, 9 September 1943
4. Field-Marshall Lord Alexander's Despatch on the Campaign in Italy, 3 September 1943 to 12 December 1944.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The war in Italy 1943-1944. ISBN 9781783462131. Published by Pen & Sword Military in 2014. Publication and catalogue information, links to buy online and reader comments.
