One by One

by Ruth Ware

In Topher’s world, people are hard, polished shells, their shiny exteriors hiding the inadequacies and anxieties inside. But Topher made a mistake. He didn’t understand that some people are the other way around. But Eva… I think Eva did understand that. And perhaps it’s what killed her in the end.

there is a list of just two people. Littlemy Anon101 I am Littlemy. Which means… Anon101 must be… Liz.

This is a mistake. All of the phones would have been close when they lost power. Without power, the Geosnoop wouldn't register that they were still close or wouldn't have registered that the others left.