The Evening's Amethyst: A Nora Tierney English Mystery #5

Who is Verity? That becomes a central question for American Nora Tierney, who has moved to her new Oxford home with her fiancé, DI Declan Barnes, and her young son. Declan's new case at Exeter College coincides with a frantic call from Nora's stepsister, Claire Scott: a fellow graduate student has died in a fall, and Claire begs Nora to help her prove her friend didn't commit suicide. The sisters conduct their own snooping, while Declan and his team juggle this death with a cold case that proves to be more surprising than Declan could ever imagine.