The Whisperer

Ragna Riegel likes to sit on the same seat on the bus every day and she likes to buy the same things at the local shop each day. She must have order in her life. And she does, until one day she receives a letter with a threat written in block capitals on the sheet inside. Facing an unknown enemy, she must use all her means to defend herself. When the worst happens, Inspector Konrad Sejer thinks it is an open-and-shut case. But Ragna may be hiding a dark secret.... -- adapted from jacket