Fatal Charm by Anne Morice
Tessa Crichton, the inquisitive actress-cum-sleuth, finds herself tracking a murderer when Eliza is found dead in her hotel room at the celebrations of her mother's 80th birthday party. Tessa becomes determined to crack the case when all likely suspects appear to have cast-iron alibis. Anne Morice is a pseudonym and has written a series of crime stories featuring the actress, Tessa Crichton. She has also written Treble Exposure and Design for Dying.