HARRIET THE SPY: Louise Fitzhugh's beloved children's novel turned 50 last year, and though lots of super-smart misfit tween girls have gotten space in print over the past half-century, Harriet M. Welsch was a trendsetter. She owned this city, roaming the Upper East Side armed with only a journal and her keen observational skills, spying on an eclectic gang of neighbors. Harriet's set in 1964, and though Miss Welsch's old neighborhood has gained a slew of FroYo spots since her heyday, both the plot and locale still hold up. Best of all, the book was banned by a bunch of libraries for teaching "children to lie, spy, back-talk and curse." Good on you for being a sassy badass, Harriet.