What is fashion? What is fashionable? Who decides what is in? What is out? Why is it green one year, and blue the next? Why is one little black dress worth three thousand pounds and another thirty quid? Is the catwalk that catty? Is everyone high on drugs and full of champagne? What makes a supermodel so super? And a designer too hot to touch? Who is making the money? Who owns who? Who hates who? And who's in each other's pocket? Following in the glamorous footsteps of ''Hotel Babylon and Air Babylon'', ''Fashion Babylon'' will get under the well-cut skin of the fashion industry. Using a world renowned source, ''Fashion Babylon'' will take you through six months in a designer's life. Starting at the end of one catwalk show, it will explain how a collection is put together - from the rail of found objects, to how it gets on to the catwalk, into the shops and onto the covers of a magazine. It will tell you who goes to the shows, where they sit and whose backside one needs to kiss to get there.It will introduce you to a host of places and characters, it will take you into a world where women get paid tens of thousands for getting dressed in the morning and where a wrong shirt length can cost you your career. Witty, naughty and full of gripping detail, ''Fashion Babylon'' will explain the mark -ups, talk you through fashion's two seasons and discuss the money and commerce behind one of the most international, lucrative and secretive of businesses. With something for the simple follower of fashion as well as the hardcore fashionista, ''Fashion Babylon'' will change the way you sashay into Top Shop, flick through the pages of ''Vogue'' and enter the portals of Harvey Nichols forever.