This boxed set includes the following mystery novels: THE MYSTERIOUS AFFAIR AT STYLES BY AGATHA CHRISTIE THE MYSTERIOUS THREE BY WILLIAM LE QUEUX THE SINS OF SÉVERAC BABLON BY SAX ROHMER A ROCK IN THE BALTIC BY ROBERT BARR DEEP MOAT GRANGE BY S. R. CROCKETT THE SECRET ADVERSARY BY AGATHA CHRISTIE THE RIDDLE OF THE SPINNING WHEEL BY MARY E. AND THOMAS W. HANSHEW THE UTTERMOST FARTHING A SAVANT'S VENDETTA BY R. AUSTIN FREEMAN