K.B. Owen 
Unseemly Honeymoon 
book 6 of the Concordia Wells Mysteries

When a killer crashes the honeymoon, three’s a crowd…It’s the summer of 1899, and Professor Concordia Wells—now Mrs. David Bradley—eagerly anticipates their honeymoon in the Hamptons. She has one errand along the way, to visit a former student seeking advice. About a love interest, no doubt.If only it were that benign. The young lady, now employed as a switchboard operator, inadvertently eavesdropped on a murder plot involving the high finance world of the Stock Exchange Luncheon Club. How to notify the police without losing her position? Before Concordia can think of something, the girl is murdered.Without proof, the police give little credence to second-hand conspiracy tales. David convinces Concordia to leave the matter to the authorities and go on with their honeymoon. Little do they know that trouble will follow them to their peaceful getaway, and entangle them in secrets and long-standing grudges until they are fighting for their very lives. “’Til death do us part” may happen sooner than the couple ever imagined.