Hey Guys, Tony here.
A few weeks ago I was looking at the KDP dashboard and noticed something brutal. Most self-published ebooks earn under $100 a month. Total. That means thousands of authors spent weeks writing books nobody wanted to buy.
The problem isn't writing. It's what they're writing about.
Without validation, you're guessing. And in 2026, with AI cranking out a million ebooks a year, guessing is a death sentence.
Here's what pissed me off enough to build my own: I bought a similar tool a while back. Looked promising. Then I hit the catch — it only validated certain pre-approved niches. Want to publish in your niche? That's an upsell. Want full access? Another upsell. The whole product was engineered for the launch, not for the user.
So I built ProfitBook Pro to fix it. The app works on any niche you can type into the box — no locked categories, no "unlock more niches" upsell. And it does two things in sequence that nobody else combines:
1. Validates the niche before you write — using a 6-metric scoring system covering Profitability, Novelty, Urgency, Longevity, Audience Fit, and Competition.
2. Writes the entire book for you — 17,000+ words of genuinely good content, using Claude as the engine.
I'm not asking you to take my word on the quality. Two complete books are linked below. Read the opening paragraphs. Decide for yourself.
15 minutes per book. $97 to own the app forever. Let me show you what it does.