Former AC/DC bassist Mark Evans talked to The Australian and in the new book The Youngs: The Brothers Who Built AC/DC, reveals that the band nearly fired Bon Scott after overdosing on heroin in Melbourne in 1975. Evans said AC/DC's founding members Angus and Malcolm Young, who were anti-drugs, took a dim view of their iconic frontman overdosing on heroin in Melbourne in 1975.

"There were some doubts about Bon at that stage," Evans said. "He'd had a problem or he'd had an OD very early on. It was just a dabble . . . Bon just made a bad decision. It was only one bad decision. From what I was led to believe and came to believe, it was a very, very isolated incident. I never saw any evidence of anything remotely like heavy drugs (when I was in AC/DC)."

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With sales of over 200 million albums, AC/DC is not just the biggest rock band in the world. It's a family business built by three brothers: George, Malcolm and Angus Young. And, as with any business, some people prospered while others got hurt along the way.

The Youngs: The Brothers Who Built AC/DC is unlike any AC/DC book you've read before. The 320-page paperback is less a biography, more a critical appreciation, it tells the story of the trio through 11 classic songs and reveals some of the personal and creative secrets that went into their making.

Important figures from AC/DC's long way to the top open up for the very first time, while unsung heroes behind the band's success are given the credit they are due.

Accepted accounts of events are challenged while sensational new details emerge to cast a whole new light on the band's history – especially their early years with Atlantic Records in the United States.

Former AC/DC members and musicians from bands such as GUNS N' ROSES, DROPKICK MURPHYS, AIRBOURNE and ROSE TATTOO also give their perspectives on the Youngs' brand of magic.

Their music has never pulled its punches. Neither does The Youngs.

After 40 years, AC/DC might just have got the serious book it deserves.

For more details and to order visit Randomhouse.com.au.