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The Circular Staircase is a mystery novel by American writer Mary Roberts Rinehart. The story follows dowager Rachel Innes as she thwarts a series of strange crimes at a summer house she has rented with her niece and nephew.

Get swept away to the glamor of a 1950's department store where four women's loyalties, vanity, friendship, and detective skills are put to the test. These four women have much to dislike about each other, but they unanimously agree that Mr. Wynton is the best of employers and must be protected at all costs from someone who seems determined to see him gone for good. When other employee deaths occur, can the women band together to solve the murders, or will they discover it is one of their own bent on destroying Wynton's from within?

Birch Tree, Maine, is experiencing a rash of deaths, all mysteriously linked to food trucks that frequent the Birch Point Lake Park. Angel’s new donut truck was doing great, until deathly rumors started. Shanice thought she had customer support when taking over her grandpa’s potato truck, until one started complaining. Marisol’s taco truck is a fixture in the park, until linked to a food judge’s death. Mey’s noodle truck was her ticket to a new life, until her ex-boyfriend threatens to take it away. Could competition between vendors have led to this murder and mayhem?