Is this a good idea for my Eng Lang A2 Language Investigation cwk?

So I've gone from comparing political interviewers (boring), to comparing Facebook wall posts between a boy and a girl, two girls, and two boys (unreliable transcripts and very awkward!) to my current plan which I think I can stick to! I do realise it's late but I've been in hospital from a car accident so I've only just been given this! My plan now is to compare and contrast the language used in a children's book - probably Winnie The Pooh - a book for teenagers - probably Twilight - and a book for adults - probably The DaVinci Code. I thought of a lot I could write for this essay, mainly that the language used is much simpler in children's books, books for teenagers focus a lot on relationships and unrealistic dramatics (i.e. giving birth to a baby that's half vampire, half human..sorry for the spoiler if you haven't read it yet!) and there are more references to historical or scientific shtuff in books for adults. Anyone liking this? I'm much more pionate about this than the others which is obviously an important factor when writing any essay. What else do you think I could write about? Thanks for your help in advance! Thumbs up and easy points for you!