The first wife of late comic Peter Cook is planning to expose dark secrets about their stormy marriage when she publishes her memoirs this year (06). WENDY SNOWDEN walked up the aisle with the troubled British funnyman in 1963, but their romance soured when his alcoholism spiralled out of control. She said, "Alcohol stokes up the demons and a completely different person starts to emerge. "He did know how to behave well but it rotted into something else." The book will be titled SO FAREWELL THEN, and has been described as the "untold life" of Cook.