To mark their 140th anniversary, Harper's Bazaar has put together a book that will help you perfect your wardrobe and sense of style. Harper's Bazaar Great Style: Best Ways to Update Your Look by Jenny Levin ($18) will be your fashion companion for a long time, especially if you love getting advice and seeing photos of well-dressed celebrities. Among the laundry list of treats: event-appropriate wardrobe tips, accessory must-haves, the 10 commandments of dressing, advice from famous designers, closet essentials, investment pieces, and looking fabulous at any age.