Dying For You — Geraldine Evans

Rafferty becomes chief suspect -in his own double murder inquiry
Detective Inspector Rafferty signs up with the Made in Heaven dating agency, discreetly using an alias. He's very much charmed by the first two women he meets, but love is fickle. Both of them are dead by the following Monday. Now he's got to double up the ingenuity required to solve the crime with the slyness to avoid being found out.