Book excerpt: The ultimate sartorial and etiquette guide, from the ultimate life and style guru. By turns witty, sardonic, and always insightful, Glenn O’Brien’s advice column has been a must-read for several generations of men (and their spouses and girlfriends). Having cut his teeth as a contributor at Andy Warhol’s Interview in its heyday, O’Brien sharpened them as the creative director of advertising at the hip department store Barneys New York for ten years before starting his advice column at Details magazine in 1996. Eventually his column, "The Style Guy," migrated to its permanent home at GQ magazine, where O’Brien dispenses well-honed knowledge on matters ranging from how to throw a cocktail party (a diverse guest list is a must), putting together a wardrobe for a trip to Bermuda (pack more clothes for less dressing), or when it is appropriate to wear flip-flops in public (never). How To Be a Man is the culmination of O’Brien’s thirty years of accumulated style and etiquette wisdom, distilled through his gimlet eye and droll prose. With over forty chapters on style and fashion (and the difference), on dandies and dudes, grooming and decorating, on how to dress age-appropriately and how to age gracefully, this guide is the new essential read for men of all ages. From the Hardcover edition.