That Weekend by Kara Thomas

Three best friends, a lake house, a secret trip – what could go wrong? It was supposed to be the perfect prom weekend getaway. But it’s clear something terrible happened when Claire wakes up alone and bloodied on a hiking trail with no memory of the past forty-eight hours. Three went up the mountain, but only one came back. Now everyone wants answers – most of all, Claire. She remembers Friday night, but after that… nothing. And now Kat and Jesse – her best friends – are missing. That weekend changes everything… Read more.