A reunion of ghosts

"In the vein of such classic family sagas as Fall on Your Knees, A Reunion of Ghosts is the confessional of three sisters who have decided to kill themselves on the very last day of the 20th century; in it they tell the story of a family haunted by suicide ever since the sisters' great-grandfather, a Nobel Prize-winning chemist, developed the first poison gas used in warfare and also the lethal agent used in the Third Reich's gas chambers--inspired in part by the troubled life of Fritz Haber, Nobel Prize winner and inventor of mustard gas"--