I write to oppose this as written. As a librarian, I support the right parents already have to determine what their children read. But parents do not have the right to determine what other children may read.
Truthfully, youth are naturally curious. Limiting their choices often has the opposite desired effect. Forbid a topic or title and everyone is drawn to it.
READ what your child READS. Discuss it with your child, including any reasons you have for objecting. You are the most important opinion in your child's life. Your child will be exposed to issues--and earlier than you think!--and being proactive in exposing them and discussing the issues is better for your child in the long run than 'protecting' them. Give them the tools to make the choices.
Withdrawing books from libraries because of one objection is a slippery slope. And though the topic may be difficult or even terrible, youth that may be experiencing the trauma depicted in a book need that book to show them they are not alone and they are not at fault. Bad things happen to kids, not because they read about them. Books can help those kids experiencing trauma process it.