The book is about a rural New Zealand boy who gets a scholarship to an all-male school in the city.
He encounters all kinds of new experiences - including the sexuality of older people, bullying and marijuana smoking.
Auckland author Ted Dawe won the top prize for it in the New Zealand Post Children's Book Awards in 2013. He told the New Zealand Herald its main theme was bullying, and the lasting damage it can cause.
Ms Handley said no one took much notice of the book until moral outrage about it being nominated for the award created a buzz about it.
After that it still didn't sell well, and she thinks it had a bad rap. She liked the way it dealt with issues today's teenagers faced, and that it was set in a New Zealand readers could identify with.
"It would be a great sixth form class text, because it raises issues that are real issues in our community."
It did have explicit sexual content, but was never seedy or disgusting. And she said young people watched much more graphic things on television.
"We have got to this stage where kids can watch anything on TV. Watching people being shot is okay, but you're not allowed to read about a young boy discovering his sexuality."
People should read the book before judging it, she said.
"It makes me sad for Ted Dawe. Being an author is never easy. It won Book of the Year, but to me it didn't get the accolades it deserved."
The manager of Wanganui's Whitcoulls store was not allowed to comment on the book ban, and the manager of the Davis Library was not available yesterday.