This site-Bored of Studies- has some great notes and essay samples under the "Resources" section. Just click on resources, then Standard English and scroll down until you get to the Module C section. There are also some commercial texts-the Board of Studies prints copies of high ranging responses each year which you can buy from their web site for about $35 and there is a small study guide put out by Cambridge Education called "Checkpoints" which contains samples of essays on many texts. The 2012 copy I have has essays on "The Year of Living Dangerously" and "The Castle" for Module C the Global Village.All the best.
