the topics:
time travel possibilities 2. color theory/symbolism in art 3. animal symbolism in different cultures 4. doomsday/end of the world scenarios in myth and media 5. doomsday/end of the world scenarios preparation (buy a tent and a gun) 6. absurd and amusing conspiracy theories
the books:
malleus maleficarum 2. dead men do tell tales 3. tasing secrets from the dead, my investigations at america's most infamous crime scenes 4. blood secrets: chronicles of a crime scene reconstructionist 5. the sane society 6. bone voyage (again it's still about forensic anthropology, you perverts)
still though, to reiterate, you can still pick something that's not on the list so long as you both agree to it