Device Free Weekend by Sean Doolittle

Seven friends, one eccentric billionaire, an all-expenses paid reunion on a private island with one catch: no phones, tablets or laptops allowed. It'll be a weekend to remember-for those who make it out alive.

Ryan Cloverhill, founder and CEO of the world's most popular social media platform, invites his six best friends from college to his home on his private island near Puget Sound. For Stephen, Emma, Perry, Will, Beau, and Lainie, day one is just what the doctor ordered: amazing food, many drinks, lots of laughter, and a sunset cruise around the island aboard their host's custom Van Dutch 55. 
Day Two, however, takes a bewildering turn when the six hungover guests wake up to find that their host has disappeared, along with all connection to the mainland. A touchscreen tablet of unknown make awaits them, blatantly defying the rules of the weekend with its on-screen challenge: Unlock Me! The passcode to the tablet is hidden...

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