Chapter & worse Book finds plenty to rip Rudy for on 9/11 BY DAVID SALTONSTALL DAILY NEWS SENIOR CORRESPONDENT Former Mayor Rudy Giuliani is taking a lot of hits in a new book about 9/11. Rudy Giuliani's image as America's Mayor is harshly questioned in a new book that takes to task the city's preparedness on 9/11 - with some of the most pointed criticism coming from current Police Commissioner Raymond Kelly. Kelly, who was dismissed from the post by Giuliani in 1993 and later reappointed by Mayor Bloomberg, offers several dramatic and remarkable observations in "Grand Illusion: The Untold...