From New York Times and USA Today bestseller Michael Prescott, author of FINAL SINS and COLD AROUND THE HEART, comes RIPTIDE, a dark, unsettling descent into old crimes and new madness. Jennifer Silence reads between the lines. A psycholinguistic analyst, she studies documents written by murderers, teasing out hidden clues. But nothing in her life has prepared her for the document that is now in her hands. A leather-bound diary from a crumbling crypt. The diary of Jack the Ripper. If it is genuine, it suggests a troubling connection between Jennifer's family and history's most infamous serial killer. A connection that may explain her father's suicide ... and her brother's mental illness. A connection that may implicate her brother in a new rash of killings, and prove that the Ripper's spirit still prowls dark streets and alleys, taking lives ... And the next victim may be Jennifer herself.