Sibling rivalry is not unfamiliar to sisters Brett and Kelly, and this tension escalates when they're cast in the same reality show Goal Diggers, which features young, ambitious female entrepreneurs. But did this jealousy lead to Brett's mysterious death? The novel fluctuates between past and present from the points of view of three of the cast members. Stephanie hides a dead marriage and a string of affairs that only contribute to her unhappiness. Kelly is constantly trapped in her sister's shadow, wanting to be recognized for her own accomplishments. And Brett, who appears to have everything she ever wanted, hides her own reality from the cameras. VERDICT Knoll's second thriller (after Luckiest Girl Alive) combines the cut-throat world of reality television and the competition for fame among alleged friends. The unexpected and unpredictable twists and surprising revelations will delight suspense fans.—Adriana Delgado, Palm Beach Cty. Lib., Loxahatchee, FL

Knoll (Luckiest Girl Alive) explores the blurry line between a reality show and real life—and the duplicity of family ties and friendship—in this razor-sharp, darkly comic thriller. The grisly murder of spin and yoga studio entrepreneur Brett is revealed at the outset of this briskly paced whodunit; the narrative then flashes back, unfolding the complex how and why from the perspectives of narrators Brett, the overweight "least-loved sibling"; her thin and pretty sister Kelly, who abandoned a high-profile career path to be a single mom and run Brett's growing business empire; and bestselling author Stephanie. All three are contestants on the reality show Goal Diggers, which hypes the accomplishments of "unmothers and unwives" and is run by conniving and high-profile network executive Jesse. The characters compete for prominence, audience popularity, and social media buzz. It's off-screen where things take a dark turn: Brett's "enigmatic gay millennial" persona comes apart and Stephanie's bestselling memoir is exposed as anything but true. Though the mystery is engrossing enough in its own right, Knoll's novel is most notable as a potent takedown of a reality-show-obsessed culture that seeks out the spotlight rather than harder truths. (May)