The Cipher He Buried

Ivy Lennox has spent two years decoding her brother's notebooks, hoping they hold the plan for the water system that could keep her co-op alive. What they hold is a set of coordinates and a lie. Two ridges away, in a rusted weather station, the cache her brother died for is still intact — and the letter inside names the man who burned the lab. That man is the father of the boy walking beside her. A pulse-pounding YA apocalyptic mystery with romance, told in a notebook someone finally got to finish.