I'm looking for fiction, genre doesn't matter. I prefer it to be subtle in exploration of the themes. Just to put one popular example, Fault in Our Stars wouldn't be something I'm looking for.
Few examples of books I like that deal with time and death, among other themes: Out Stealing Horses by Per Petterson, Memoirs of Hadrian by Marguerite Yourcenar, Norwegian Wood by Haruki Murakami, Immortality by Milan Kundera, The First Man by Albert Camus, All Quiet on the Western Front by Erich Maria Remarque, Butcher's Crossing by John Williams
by abouthodor