Next topic (due friday the 12th at 11:59PM PST): coaster156 suggested Chiaroscuro. So take a picture which utilizes a lot of chiaroscuro.
Mega brownie points to him because as soon as I read his message I immediately thought of another topic as well, which will probably be used for the November 26th topic. (They're quite related so I don't want them to be back to back.