The Clue - Carolyn Wells - Bog

On the eve of her wedding, a beautiful heiress is found stabbed to death in the library of her mansion. A suicide note is found next to her body, but the evidence points to murder. The house had been securely locked with no sign of a break in. Suspicion falls by turns to the groom who loved another, the cousin who stands to inherit her fortune, the woman the groom loves, the murdered woman