Death Is a Red Rose — Dorothy Eden

Mistaken identity and evil desires.

When Cressida Barclay rented the vacant flat in the decrepit mansion, she unwittingly became more than just a tenant of the eccentric Arabia Bolton. The strange old widow believed her new roomer to be her long-dead daughter, also named Cressida.

Too soon, it became apparent that someone else was confusing the new girl with her dead namesake. The first Cressida had died under mysterious circumstances -- was the killer in the house now, anxious to kill again in fear that the phoenix had risen from her own ashes?

Weakened by terror, and by her growing feelings for Jeremy Winter, a boarder who could be foe as easily as friend, Cressida lets herself get trapped in a corner created by another girl, a corner from which there is no escape except death.