It’s dress-up for grown-ups, and the liveliest, most imaginative collection of Halloween costume ideas–447 costume ideas to be exact–from two hip, inveterate lovers of all things Halloween . . . plus dozens of other ideas for enjoying the holiday. Bridie Clark and Ashley Dodd are the dynamic duo, in or out of capes. For every level of interest, time–and irony–they offer suggestions. There’s the ultra-quick: Pin several pair of underwear to a shirt, and voilà, A Chest of Drawers. With a bit more time, wrap yourself in aluminum foil and don a beret–mmm, French Kiss. There are Angels and Devils, all with variations (add roller skates to your Satan costume, and go as Hell on Wheels). Come Hither costumes–Lady Godiva, Chippendales Dancer, Stripper Emerging from a Cake. Celeb sightings, from the Dalai Lama to Madonna (six Madonnas, actually, from all of her phases). Costumes for couples–Sweethearts Caught on Lover’s Lane, Fred and Wilma Flintstone–and costumes for whole groups of friends, including how to appear as the Sopranos or the hapless castaways on Gilligan’s Island. And for the children, check out Nursery Rhymes, Fairy Tales, and Other Costumes for the Young and Young at Heart. Finally, for the friend who just can”t bear the thought of dressing up but still wants to join the fun, suggest the Time Traveler from the Day Before Halloween.