Tom Wolfe is working on a new novel “Back to Blood,” which will deal with “class, family, wealth, race, crime, sex, corruption, and ambition in Miami.” Wolfe, 76, the best-selling author of “Bonfire of the Vanities,” is writing for new publisher Little, Brown and Company. Publication date is 2009. Wolfe needs to win back some readers. “I Am Charlotte Simmons,” his previous novel, was a critical and commercial flop.