How it works

Our story



Client case study:

How Jeff Peterson used KDSPY to make more money as a narrator for Audible.

"I used KDSPY to choose books that sold well in Kindle before I would narrate them for Audible. I get a percentage book sales, so it HAS to be selling or I waste my time. I could narrate 1,000 books easily and not sell 20 copies. It's only by choosing winners that I can make money with. I have authors now who come to me who I know are winning writers, but back in the day, your software was the only tool I had that steered me to projects that would sell and earn me royalties". – Jeff Peterson, Audible Narrator.

As featured in:

"Amazing software... one of the best resources an author can have." – Geoff Shaw

✅ Find out what books are selling – with revenue estimates – on Amazon right now. 

✅ Find the "profitable" book niches, sub-genres and keywords to improve your sales

Reverse engineer the bestsellers in any of the 25,000+ book or Kindle categories, author pages & keyword search results. 

Generate consistent sales & grow your audience by writing books people want.

Save time on book research with our "one-click" market research plugin.

RISK-FREE 60-day money back guarantee.

Windows Compatible

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Firefox Compatible

Chrome Compatible

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Registered in England and Wales, Company No: 09309821.
Trading as Publishing Altitude. All Rights Reserved.

Trading Address: 20 Castell Road, Loughton, IG10 2LT, UK.

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KDSPY  – known previously as Kindle Spy – is not affiliated with Amazon or any of its subsidiaries.


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