anything and everything!
No seriously, fiction, old and tried favourites, Donford Yates, Georgette Heyer, Norah Lofts, Dorothy L. Sayers, Agatha Christie, Jane Austen, Charlotte Brontë.
Research in my fields, history, especially from 1500 onwards. The Bible, The German romantic poets (in German) Danish Romantic Literature (in Danish). Shakespeare.
I don't care for modern detective stories, as most are either totally unrealistic, or worse are more interested in the atrocious crimes and the people who commit them than on demonstarting that crime is wrong -which to me should be the focal point of detective stories.
Plus anything that catches my eye when I go to the library.
Ups! forgot Umberto Ecco up to The Prague Cemetary - I can't get on with his more recent works.