Sparkling Cyanide (Mystery Masters)

<p><p>Rosemary Barton&#8217;s birthday party takes a turn for the worse when she imbibes cyanide instead of champagne. The verdict? Suicide. But why would a beautiful, wealthy woman kill herself, especially when so many of her guests &#8212; including her lover, her husband, and her own younger sister &#8212; have reasons to want her dead? When anonymous letters questioning the coroner&#8217;s verdict start turning up a year later, Rosemary&#8217;s husband decides to recreate the party and corner the killer. Unfortunately, the killer has other ideas.</p>