A new book delves into the way Luke Batty tried to protect his mother from his father’s abuse.

Grieving Victorian mother Rosie Batty’s 11-year-old son, Luke, was murdered by his father at cricket training in Melbourne on February 12, 2014.

Ms Batty’s tragic and powerful story has been detailed in her biography, A Mother’s Story, which will be released in bookstores on Monday night.

It outlines the toll on Luke of witnessing his dad’s violent attacks at a young age, and his maturity during this time.

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Ms Batty, the Australian of the Year, has been working tirelessly in putting family violence in the forefront of people’s minds, working alongside governments, agencies and communities to stamp out domestic violence.

In one part of the book, Ms Batty described one horrific incident in 2012 that stuck with Luke.

She said he felt helpless about not being able to save his mother from his dad’s rage.

The book, as described by News Corp, Luke watching on as his dad chased his mum around the house, pushing her to the ground, kicking her and threatening her with a vase.

“I tried to stop him,” Luke later told a psychologist.

“I tried to pull him off Mum, but I was too little.”

In February 2015, Ms Batty launched an app to help young women understand the warning signs of controlling and abusive behaviour in relationships.

The iMatter app was designed to teach women about intimate partner violence and build resilience.

“If it [the relationship] doesn’t feel right, get out of it. Get out,” Ms Batty said.

“It never gets better. And I think that’s the unfortunate thing about relationships.

“We rarely do end them when we should.”

Ms Batty will launch her autobiography on Monday night at Readings, in Carlton, Melbourne.