Jackie 'O' Henderson's new memoir The Whole Truth drops down to number four in book charts as it's beaten by John Farnham and two cookbooks

Jackie O Henderson's new book is already sinking with readers just two days after it first hit the shelves.

The 49-year-old's tell-all tome The Whole Truth was riding high on Amazon's bestseller book list at number two on Wednesday.

But by Thursday afternoon the mother-of-one's racy life story had fallen to number four on the online seller's book chart.

And in a surprise twist Jackie's tale was beaten by John Farnham's memoir The Voice Inside, which sits at number three.

Meanwhile, the two top spots on Amazon's bestselling chart are cookbooks, RecipeTin Eats: Tonight: Dinners for every night of the week at number one, while foodie Brooke Bellamy's Bake with Brooki sits at number two.

Daily Mail Australia has reached out to Jackie O's publisher Penguin Random House for comment. 

It comes after Jackie announced the profits of her memoir will be donated to charity.

The radio queen recently came under after revealing on The Kyle and Jackie O Show that she secretly checked into the Betty Ford Clinic for drug and alcohol addiction in November 2022.

Many criticised the radio personality for using an overseas facility favoured by the rich and famous, while thousands of Australians struggle to afford local rehabilitation services.

On Monday, Jackie took to Instagram to share that she took on board the comments and would be donating her book's profits to a worthy cause.

In the post, she wrote a long message to her fans, saying she had been 'deeply moved by the thousands of messages' she had received from people 'unable to afford rehab'.

Jackie went on to acknowledge that not every person who struggles with addiction would have the same opportunity.

'Which is why, all my profits from my book, which is on sale tomorrow, will be donated to Odyssey House Drug and Alcohol Rehabilitation Centre,' she continued.

'Odyssey House provides life-changing support to individuals seeking treatment but who are struggling financially...the work they do is powerful, important and transformative.'

The radio star made the stunning admission about her addiction issues during a tearful conversation with her co-host Kyle Sandilands on their KIIS FM radio show last Thursday morning.

Jackie revealed that at the height of her addiction she was consuming up to 12 Stilnox sleeping pills and 24 Panadeine Forte tablets daily, often with alcohol.

Known for treating Hollywood stars including Keith Urban, Robert Downey Jr. and Lindsay Lohan, the Betty Ford Clinic charges anywhere from $45,000 to $90,000 AUD for a month-long stay, depending on the program.

Jackie admitted she was advised not to reduce her pill intake before arriving at the clinic, meaning she was still using the substances the day she flew out to the US.

When Jackie took her break from the show in 2022, Kyle Sandilands told listeners she was stepping away to 'focus on her health' after contracting COVID-19.

However, behind the scenes, the beloved radio host was battling an addiction that had spiralled out of control.

Jackie admitted she was ashamed of her secret, fearing public judgement, and decided to get help after hitting rock bottom.

Jackie said she began struggling after her split from UK photographer Lee Henderson in 2018.

Jackie said she wanted to publicly speak about her addiction battle to reduce the 'stigma' around drug dependence and 'normalise' it.

The presenter bravely apologised to listeners for not revealing her health struggles before and revealed she will be marking two years of sobriety in a matter of weeks.

'I want to apologise to our listeners and everyone in my life [...] I just needed to concentrate on that part first, that recovery,' she said.