If you're looking for books about maternal abandonment and the search for a replacement, here are a few suggestions.
I found Jennifer Lauck's two autobiographies Blackbird and Still Waters particularly disturbing. Many people (not me) found great meaning in The Glass Castle, written by Jeannette Walls - there are more than 1400 user reviews posted on Amazon for the book, so she must have hit an emotional nerve with readers.
I highly recommend another book, Hope's Boy, also an autobiography. The story falls apart halfway through the book, but the emotion is real. If you came from a normal family, the story may seem unrealistic and over the top, but it made perfect sense to me. One important thing to understand is that kids separated from their mothers for any reason other than death live with a fantasy, however remote. As soon as I get back to Mom's house, everything will be just fine.
Even the youngest child will try to negotiate with their new caretakers, explaining they have to get home as soon as possible. Mom needs me. It's insane from a logical point of view. A kid could be wrapped up like a mummy in bandages from being burned, and they know their mother (or the female substitute, aunt, grandma, whoever) was responsible for their injuries, but they still want her.
I almost didn't come back after my first day on the job as a child care worker in a group home for infants and children who had been taken away from their parents by social workers. A kid no older than five attached himself to me, believing I had the ability to get him back home to Grandma. He was frantic about having to get home before dark, because she was home alone, and he didn't want her to be sad all by herself. The child never mentioned having a mother. I can still hear his voice after all these years, the seriousness, pitching the story to me like he was about to close a million-dollar real-estate deal.
Children who lose a mother through death go through a different kind of grieving process (although I'm sure the experience is just as traumatic and life-altering). Death has an ending. Abandonment leaves the door wide open for kids to live in a fantasy world, even into adulthood. When she's dead, you figure out one day that she's never coming back, but a mother who's still alive leaves open the possibility for a happy ending.