Booker, M. Strange TV: Innovative Television Series from The Twilight Zone to The X-Files. Westport, CT: Greenwood Press, 2002. Print.
There was a section of this book dedicated to The Twilight Zone, and from there I was able to get information on how the prevailing 1950s culture shaped the content of the show.
Brode, Douglas. Rod Serling and The Twilight Zone. For Lee, NJ: Barricade Books, 2009. Print.
This book supplied me with a lot biographical information on Rod Serling.
Zicree, Marc. The Twilight Zone Companion. Los Angeles, CA: Silman-James Press, 1982. Print.
This book gave a lot of information on important episodes from each season.