i find that i choose books based on the season. how would you distinguish a 'winter' book, from a 'spring' book, 'summer' book, and an 'autumn' book?
I also associate certain books with certain seasons, though I have no fixed methodology for this. I think of Ethan Frome as a winter book; I think of Huckleberry Finn and To The Lightouse as summer books; these books take place during specific seasons so the associations are rather obvious. Some books, like Anna Karenina, happen to span many seasons - though most people would probably associate that one with winter, when Anna and Vronsky meet for the first time, in snowy fur-clad Saint Petersburg. For my own reasons, I think of Anna Karenina as a summer book (it was during the summer that I read it first in my own life). The process is entirely subjective, immune to reason or logic.