Celebrity fitness trainer Jackie Warner touts her 10 in 10 for those to whom Weight Watchers sounds like an eternity. “Losing weight fast and healthy shouldn’t be reserved for the entertainment elite or for those who can afford to see me,” she writes. (Those fortunates include Paul McCartney, Julia Roberts, Maria Shriver and Alanis Morissette.) But fast results often mean boot-camp conditions, right? Warner promises otherwise. “I don’t want to create a bunch of skinny, bitchy, miserable people. My No. 1 goal in life is to help people go from unhappy to happy.” (Coming in March from Grand Central)