You might like the novel We Are All Completely Beside Ourselves by Karen Joy Fowler. I personally prefer to go into books without knowing much about them, so I will put the premise in a spoiler tag:
the premise
It's about a woman who was raised from birth with a chimpanzee as her twin sister, as she tries to figure out why her sister suddenly disappeared from her life when they were young, and where she is now.
It has a fairly comic tone, which is very welcome given all the trauma.