How Nuria Corby Earned $13,900/Month Passively with Amazon KDP

Overview

Nuria Corby began publishing on Amazon Kindle Direct Publishing (KDP) in November 2019. By December 2021, she was earning $13,900 in truly passive revenue each month from a catalog of 512 low-content and children’s books. Despite only about 30% of her titles ever selling, the ones that do keep generating royalties on autopilot. This case study breaks down her launch process, traffic strategies, and scaling tactics, so you can follow her path.

Getting Started on Amazon KDP

Amazon KDP opens the door to Amazon’s 80% share of the global ebook market. Nuria used simple tools—Canva for interior layouts and basic covers—and published journals, planners, and children’s activity books. Low-content books can be 50–60 pages long, and templates speed up production.

Building a Catalog

Consistency was key. Nuria created dozens of titles per month to test niches, from gratitude journals to goal planners. Only 20–30% of her books ever got a sale, but that small slice accounted for recurring royalties. She kept publishing, tracking sales by category, and learning which topics and cover styles resonated.

Traffic Sources and Ads

Organic Amazon search drives most KDP sales. Nuria optimized book titles and descriptions with relevant keywords. In December 2021, she spent $2,000 on Amazon ads with a 35% ad cost, turning off campaigns when spending spiked. Despite the learning curve, ads delivered spikes—like $1,400 in sales on December 22 alone.

Refining Your Portfolio

One of Nuria’s books hit #1 in its category. That bestseller sent traffic to her other titles. She studied reader reviews to spot feature requests—like larger page size or humor in prompts—and iterated on new editions. This feedback loop turned customer comments into design improvements for future books.

Key Tips for KDP Success

• Create in volume: publish dozens of books before expecting consistent sales.
• Maintain quality: design clean interiors and eye-catching covers.
• Run ads strategically: test small budgets, pause high-cost days, then scale winners.
• Study reviews: read buyer feedback for ideas on new features or niches.
• Be patient: passive royalties build over time; results compound as your catalog grows.

Results and Impact

By the end of 2021, Nuria’s catalog earned her $13,900 monthly without creating new books that year. The portfolio keeps growing in value: established titles get more reviews, climb rankings, and funnel sales to newer releases. Her next goal is mastering ad campaigns to boost visibility further.

Conclusion

Nuria Corby’s Amazon KDP journey proves that a consistent, data-driven approach to low-content publishing can yield steady passive income. With simple design tools, thoughtful keyword research, and strategic ad spend, you can build a scalable KDP side or full-time business.