Leicester is good. My brother studied English there. No need for books to sample classic literature and poetry these days. The internet is awash with the stuff, but Project Gutenberg is a good place to start.
As for Keats, try Lamia, although it's a long one. Otherwise his Odes are probably his best work - my favourite being To Autumn. It's worth giving Tennyson another chance. I recommend Idylls of the King.
Good luck with your exams.

Good luck with your exams.
