The star – who is now married to Kieran Hayler – told Australia's The Morning Show that she wouldn't be holding back when it came to spilling all the juicy details.
We wouldn't expect anything else from Katie!
She teased: "I think people are always shocked by what has happened to me. My next book is out in October and, oh my God, I think I better leave the country when that one comes out.
"There are lots of things in this one I left out in the last one. There are a couple of guys in there who have upset me so I think it's about time I tell the truth about them. They are a household name. I'll be disappearing somewhere in the Maldives or somewhere where no one can see me when that book is out."
The mother-of-five has already promised her latest tell-all book will be explosive, telling Reveal last year she would share all the details about husband Kieran's infidelity and why she took him back.
"All will be explained. Sometimes people deserve a chance and there's reasons why. Trust me, if it was one of my friends, I would have said, 'What are you doing, get rid of him'. But nobody knows what has happened."
"There's so much to go in [my autobiography], not just about what has happened this year, but stuff that I missed out from the last one - which will definitely raise eyebrows. If you think what's happened to me this year has raised eyebrows, you just wait to see what I left out."
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