Bridge by Lauren Beukes

It was a game they played; the other worlds, the other lives. It was part of her mom’s grand delusions. It wasn’t real. Unless it was… 

Bridget Kittinger has always been paralyzed by choices. It has a lot to do with growing up in the long shadow of her mother, Jo, a troubled neuroscientist. Jo’s obsession with one mythical object, the “dreamworm”—which she believed enabled travel to other worlds—led to their estrangement… Read more.