I think that last year was extremely work-intensive for me, and I only managed about 15 books - mainly when I was working abroad and staying in hotels. Years previous, when I used public transport to go to work, i'd get through an average of two books a week.
A case in point - I re-read "A day in the life of Ivan Denisovitch" (for the 483rd time!) by Solzhenitsyn, "Black Dahlia" by James Ellroy and "Mulengro" by Charles de Lint over my Christmas holiday, whilst perusing the odd chapter from "The Great Indie Discography" and "Bauhaus" ( about the art movement, not the band) by Magdalene Droste. All in the space of a fortnight.
Having holidays from work is brilliant!