(One answer from each setting; I was intending them to be one-word answers originally, but each character's personality came out in mid-word.)
Ake Tanner (Gaera): Manuals depicting new holds I can teach my students.
Jagen Turlis (Elemaer): Commentaries on scripture, histories, the occasional war novel.
Boreas (Metro City): Newspaper articles about my exploits as a superhero. Also, biographies, surprisingly enough.
Niranjan Kandadai (Strangeness in New York): Dan Brown novels, new Harry Potter books when they come out, Orson Scott Card's Ender's Shadow books, the Lord of the Rings. Not that a college student really has that much time to read fluff, especially a college student with my extracurricular activities.
Vleian Sunstrider (Shadow Gaera): History, and I also enjoy learning to speak new languages out of books. Of course, I'm sort of busy planning a revolution to read much lately.
Zame Rostrian (the TUOB setting): Political theory, biographies, letters from my grandnephews. Also, don't tell anybody, but I have developed a weakness for bodice-rippers that does not necessarily match my current station.
What do you eat in a typical day?
"Tell you what, Leto, I won't fight with you. Zeus' wives are pretty tough customers. You have my permission to boast openly that you have beaten the daylights out of me."
-Hermes, the Iliad (Stanley Lombardo, translator) Book 21