An Invitation To Murder. A most unusual death has landed Helma Zukas right in the middle of another murder scene. Stanley Plummer has been cataloging a collection of Native American books for Bellehaven's new Cultural Center when his body was found in the Center's ladies room -- stabbed through his heart, and clutching a Barbie doll. Miss Zukas is asked by the library to finish the cataloging. Now she's been asked by the victim -- in a letter dated the day he died -- to get to the bottom of the mystery. Unable to resist the urge to dig into the facts, Helma becomes convinced there's something hidden in the Center that the murderer wants -- and it may be worth killing another cataloger to keep it buried. . .