When the Walls Fell (Out of Time #2)

Professor Simon Cross and his assistant Elizabeth West have returned from their accidental journey into the past and are adjusting to their new life together as a couple. But an unwanted visit from the Council for Temporal Studies could change everything.

A murder in the past is changing the future, and if the killing isn't stopped, Simon Cross might never be born.

When they arrive in 1906 San Francisco, Elizabeth and Simon have no idea who wants Victor Graham dead or how it will happen. With the earthquake that leveled most of the city just days away, the race to save Graham thrusts them into a complex mystery of jealousy and revenge where murder might be the least of their worries.