Lepucki, Edan

"Ursa possesses a very special gift. She can travel through memory and revisit her past. After she flees her hometown for the counterculture glory of 1950s California, the intoxicating potential of her unique ability eventually draws a group of women into her orbit and into a ramshackle Victorian mansion in the woods outside Santa Cruz. But Ursa's powers come with a cost"--Provided by the publisher.

After an event causes a post-apocalyptic world, Cal and Frida find out Frida is pregnant. Alone in a crumbling city, they decide they have to find help in one of the outer settlements, but the settlement's people are dangerous and harbor dark secrets.