The Echo Man Mysterious Book Report No. 485 by John Dwaine McKenna The Echo Man, (Crooked Lane, $26.99, 326 pages, ISBN 978-1-64385-991-0), the debut of author Sam Holland, is fascinating, frightening and utterly compelling reading . . . but you’d better be able to handle a lot of gore if you decide to give it a go . . . because it’s about serial killers.  Real ones.  And their