I am studying "The Lot" by Leunig and "Spies" by Frayn.
Wow I didn't think of what you suggested...hmm I could get a lot out of comparing and contrasting the real life history with the content of the novels. Thanks!
Wow, same texts as me!
Alright, so this is what I've been doing to get some external sources for my Whose Reality essays (I'm an expository writer). I'm a fan of keeping a scrapbook, but a lot of people aren't, so I'm not sure if that's something you'd want to consider. Anyway, the very first thing I did was brainstorm my topic very extensively on the front page, and I use the ideas that stemmed from the context as a basis for finding a relevant external source. Then, after I had found something, I'd write a page reflection fleshing out the significance of reality (and whose realities were affected - EXTREMELY IMPORTANT), highlighting some of the ideas and linking it (just a little bit) to one of these texts. To give you an example, I found an article in The Herald Sun relating to an overly 'bogan' response to Australia Day - something Michael Leunig references frequently in his compilation of essays.
If you're struggling to come up with some ideas, I thought that people with disabilities or impairments would make for a good starting point. One of my reflections refers to a young man who has lost his sight and relies on a guide dog and I discussed how his perception of the world has drastically changed on a physical level, as well as how he uses his dog for a sense of visual reality. I think I mentioned the role of the dog's reality in all of this as well.
As you can see, there's a whole heap of things you can use for this context (which, in my opinion, is the most expansive of all the prescribed contexts) but you need to identify little pockets in the concept to come up with some good external sources. Remember, you can also use your own personal experiences in your essays too. Anecdotally, I've heard that examiners love this (if it is done correctly).