BOOK CLUB: 100 IDEAS THAT CHANGED FASHION

It's no secret that the fashion world is a total pendulum. So the most foolproof way to predict what's going to be in next season? By looking to the past, obviously.

For us, there's no cooler way to take a step back in time than in the new book 100 Ideas That Changed Fashion. From Central St. Martins grad Harriet Worsley, this 200-page crash course in fashion history details the good (couture, street style), the questiomable (underwear as outerwear), and the just plain weird (wearable electronics!?) ways style has morphed in the past 100 years.

Stocked with awesome vintage photographs and tons of "aha!" moments, this coffee table tome is proof that what's old really is new again. But if you still don't believe us, check out our favorite retro examples and see how they're back in style today:

Mods: "The Mods were minimalists at heart."

Fall 2011 designers: Versace, Louis Vuitton, Prada favored shift dresses, Peter Pan collars, and peacoats.

Teenager Fashion: "Girls wanted looser, less formal clothes that emphasized their youth and independence. Polo necks, jeans, and pedal-pushers offered a more casual look, whereas Hollywood movie stars inspired the teen sweatergirl style."

Fall 2011 designers: J.Crew, Band of Outsiders, Fred Perry gave an updated take on hipster prep with looser pants, button-ups, and cardigans.

Deconstruction and Antwerp: "They introduced tailoring with unstitched seams, exposed lining, and frayed edges."

Fall 2011 designers: Tess Giberson, Maison Martin Margiela, Mandy Coon

Buy 100 Ideas That Changed Fashion here.