Linda - Two ways to go for accounts of Anzio. Type in Library of Congress on your search engine. Go to Online Catalog. Go for Basic. Use drop down menu and type in anzio. You will get names and authors of many books. Take this list to your library to see what they have. If necessary ask for what you want with Interlibrary loan.
Second way - Go to Yahoo or other search engine. Just type in anzio and see what comes up. I got lots. Then when you have read the general accounts you may want to try more. Mary