PaperQuake: A Puzzle — Kathryn Reiss

Violet's paralyzing fear of the earthquakes that are rocking the San Francisco Bay Area makes it difficult for her to overcome her "baby" image. But things change when her family renovates an old building. While she helps her sisters sweep up, an aftershock dislodges a letter addressed to Baby V from 1906-- and Violet is certain the message in the letter is intended for her. More mysterious writings from the past tumble into her hands with each quake. The girls try to unravel the mystery behind these supernatural communications, but as ever more frequent earthquakes rattle their own lives, they realize their time may be running out....