Santrauka: For Amanda Martin and her friends, Ripper started off as just a game... But when security guard Ed Staton is found dead in the middle of a school gym, the murder presents a mystery that baffles the San Francisco police, not least Amanda's father, Deputy Chief Martin. Amanda goes online, offering 'The Case of Misplaced Baseball Bat' to her fellow sleuths as a challenge. And so begins a most dangerous obsession. The murders begin to mount up and Ripper players, free from moral and legal restraints, may pursue any line of enquiry. When Amanda's mother suddenly vanishes, the case becomes all too personal. `could her disappearance be linked to the serial killer? And will Amanda and her online accomplices solve the mystery before it's too late?