The book has extensive end notes as well as a lengthy list of selected sources for further investigation, picture credits, and a complete and helpful index.
This is a complete and well-researched volume on Communism in the 20th century and is an excellent reference for any investigation students might want to do for school projects or personal enlightenment. There are plenty of period pictures, as well as maps, documents, and newspaper articles to support the text. It's a bit lengthy and very dense, but readers who are very interested in this time period will soak up every word.
It's been hard to find nonfiction books about the Cold War to go along with excellent fiction titles like Rosengren's Cold War on Maplewood Street, Holbrook's The Enemy, Elliot's Suspect Red, and Kidd's The Year of the Bomb. This is an excellent overview, and might even lead readers to pick up Brimner's Blacklisted! : Hollywood, the Cold War, and the First Amendment, which gives even more information about how the Red Scare affected Hollywood and its actors.