A pair of thugs use a meat cleaver to behead a celebrity chef in the opening pages of the bestselling Finger Lickin’ Fifteen, Janet Evanovich’s 15th comic suspense novel about the Trenton-based bounty hunter Stephanie Plum. Is the decapitation amusing or tasteless after terrorists’ beheadings of captives such as the Wall Street Journal reporter Daniel Pearl? One-Minute Book Reviews will have a review of the novel next week.