Casa Madrone — Mignon G. Eberhart

MALLORY BOOKEVER -- PRETTY, PROPER, AND PENNILESS.

Wasn't she lucky to have become engaged to Richard Welbeck, one of San Francisco's wealthiest young scions? Unfortunately, an accident prevented him from going to New York for the wedding. So Mallory crossed the continent in Richard's private railway car. This happy trip, however, was fraught with terror.

Someone who would stop at nothing wanted Mallory dead.

Even as she searched for an answer to these frightening events, there was a mysterious death in the Welbeck household. Was it murder? She still did not know. Then suddenly, San Francisco was ravaged by a disastrous earthquake. In the rubble of a destroyed city lay the clues. And Mallory had to sift them out, to find the perpetrator -- before she was his next victim…