Harvey Metcalfe, an unscrupulous American businessman, cons four different men into between them investing a million dollars in a dud oil company, Prospecta Oil. Then the oil company vanishes along with the money. The four men get together and decide to recover their lost money by in turn swindling Harvey for the exact amount he took from them - hence the title, not a penny more, not a penny less. They all come up with complex, cunning schemes for getting omeny out of Harvey, and carry out each scheme in turn. The first one, involving a very sahdy art deal, was my favourite, but they are all clever, though several of them come close to failure. There are several clever plot twists in this story, and a very amusing ending. I felt that the characters were a bit indistinct, none of them struck me as particulalry memorable, but in a story of this kind the plot is the thing, and the plot in this one is amusing and gripping enough to keep you turning the pages until the end, and the ending is very good.