The screenshots are even worse than I'd imagined.
There is a particular form of emotional abuse in which the parent makes the child responsible for the parent's happiness and wellbeing. See:
bit.ly/2tZGJHw
bit.ly/2uQIasB
bit.ly/2FPwpEN
If an adult writes a novel for children advocating that children take on responsibility for a parent's happiness and wellbeing, that book is grooming all the children who read it to be vulnerable to this type of emotional abuse. Because the story they read told them it's not them being emotionally abused; it's them being heroic. All children want to be heroic. This will affect all the children reading, so it could be those with a parent with ANY issue, yes, transitioning, but also divorce, mental health issues, etc etc.
It's entirely possible to write a novel about a transitioning parent - or a parent with any other emotional struggle - that is sympathetic to the parent's struggle as well as the child's. But front and centre would be that while yes, the parent and child love each other, the child can never be responsible for what is going on in the parent's life. This is not that book.