The Hoover Files — William Harrington

Tell-all biographer Betsy Clendenin was many celebrities' worst fear. But when she began writing a book that would expose secrets buried in the notorious Hoover files, someone decided she'd gone too far. A mail bomb soon sends her, and the evidence she's unearthed, up in flames. The killer thinks he's pulled off the perfect crime, but what he doesn't realize is that "perfect crimes" are Columbo's specialty.