If the only "really clear thought" you had as a kid was "Get candy,"you'll be at one with comedian Jerry Seinfeld's first children's picture book,Halloween. This nostalgic view of Halloweens past will ring true witheveryone who remembers the trials and tribulations of trick-or-treating--fromthe stupid masks with thin gray rubber straps and cheap little staples to thehumiliation of having to wear a winter coat over your store-bought Supermancostume...