Armed with secret knowledge, Juliette, now mayor of Silo 18 and her crew set out to rescue a world she hates but now understands better -- the world of the Silos with its rigid rules and terrible consequences for disobedience.

Returning to her role as an amateur detective is the last thing library director Amy Muir wants. She's already buried under an avalanche of responsibilities, including sharing the directorship of the local public library, parenting her holiday-obsessed five-year-old twins, and helping her choreographer husband, Richard, present The Nutcracker as part of the town's festivities. With her frosty mother-in-law, Fiona, visiting for the holidays, Amy definitely...