This is what I had to say on the topic 12 months ago. I have not changed my mind:
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regarding Text Response, the following are extracts from the past 4 Assessors Reports :
2011: The highest mean score for Section A was achieved by students who wrote on Richard III, A Human Pattern, Selected Poems (Slessor) , Ransom and A Farewell to Arms
2010: The highest mean score for Section A was achieved by students who wrote on Hard Times, Richard III, A Human Pattern, Selected Poems (Slessor) and A Farewell to Arms
2009: The highest mean scores for Section A were achieved by students who wrote on Hard Times, Richard III, Selected Poems (Slessor) and Collected Stories (Farmer)
2008: The highest mean scores were achieved by students who wrote on Hard Times, King Richard III, Selected Poems (Slessor) and Collected Stories (Farmer)
There is an obvious pattern there, right ?
My tip: if you have a choice of texts, pick the 'Classic'. There is stronger and more scholarly material out there to pick your ideas from.
For less classic books you end up using inferior material from Study Guides etc