Three Days for Emeralds — Mignon G. Eberhart

MURDER AMONG FRIENDS...

"Lacy, please come," Rose pleaded. Anxious and distraught, the young woman was convinced that she was being set up for murder and that only her old school friend could save her. Then Lacy poured her a drink--and watched in utter horror as she slumped forward in her chair, dead by Lacy's own hand. It was the beginning of a nightmare that would not end as Lacy's missing emerald engagement ring turned up in the dead woman's possessions, and Lacy discovered a picture of her own fiancee inscribed "To Rose, My Loving Wife."

In this crime of the heart, Lacy was the number-one suspect. Her fiancee was nowhere to be found. And a suspicious cast of characters, all with secrets to hide, was gathering in her stepmother's elegant New York town house. Soon, as the web of intrigue tightened around her, one thing became abundantly clear: Lacy must unravel the mystery--or die!