Book review: The Entrepreneur’s Guide to Customer Development: A cheat sheet to The Four Steps to the Epiphany by Brant Cooper, Patrick Vlaskovits

Artem A. Semenov
4 min readSep 13, 2023


Entering the realm of entrepreneurship can be an overwhelming journey. That’s where Brant Cooper and Patrick Vlaskovits step in with their tome, “The Entrepreneur’s Guide to Customer Development: A cheat sheet to The Four Steps to the Epiphany.” This book sets out to provide a roadmap for navigating the intricate terrains of customer development, particularly for startups.

In this guide, Cooper and Vlaskovits dissect Steve Blank’s ‘The Four Steps to the Epiphany,’ turning it into an easily digestible cheat sheet. The crux of the book is pivoted on Blank’s ‘Customer Development’ model, which has been widely embraced for its efficacy in startup environments.

The authors paint a vivid picture of the model’s components, illustrating its relevance in launching successful ventures. Their lucid writing style augments the overall narrative, presenting complex ideas in an accessible and engaging manner. However, they could have invested more time in developing each step with real-world examples to reinforce the theoretical underpinnings.

The inclusion of case studies is a commendable effort to connect theory with practice. However, these cases lean more towards success stories, while examples of failure, which provide equally valuable lessons, are notably sparse.

Contrasting this guide with other entrepreneurial handbooks, Cooper and Vlaskovits offer a distinct take on the startup narrative. The explicit focus on customer development is a refreshing change from the typical fixation on product development. However, it’s worth noting that this approach may not resonate with everyone, particularly those with a product-centric mindset.

Speaking to its intended audience — budding entrepreneurs and startup enthusiasts — the book delivers an actionable toolkit. It successfully bridges the gap between conceptual understanding and practical application, an aspect often lacking in the entrepreneurial literature landscape. Though, seasoned entrepreneurs may find the material overly simplistic.

Summarizing the review, “The Entrepreneur’s Guide to Customer Development” is a worthy investment for anyone embarking on the startup journey. It offers a comprehensive introduction to customer development, albeit with room for enhanced practical insights.

Cooper and Vlaskovits could benefit from diversifying their case studies, drawing lessons from the pitfalls and failures in customer development, not just the victories. After all, entrepreneurship is as much about learning from mistakes as it is from successes.

This book stands as a valuable resource for novice entrepreneurs, demystifying the labyrinthine world of startups. However, it falls short of providing deeper insights that could appeal to more experienced entrepreneurs. As they say, there’s no one-size-fits-all in entrepreneurship, and the same goes for guides to navigate it.

Practical pieces of advice for entrepreneurs. Here are some of the best:

  1. Embrace the Learning Curve: Before product development begins, commit time to learning about your customer base. Startups often make the mistake of pushing a product into the market without sufficiently understanding their customers.
  2. Lean into the ‘Pivot’: Cooper and Vlaskovits advocate for ‘pivoting’ when necessary. If the feedback or data you’re receiving suggests that your current business model or product isn’t going to work, don’t be afraid to make a fundamental change to your plan.
  3. Iterate Fast and Learn Faster: Launch a ‘Minimum Viable Product’ (MVP) as soon as possible to collect valuable customer feedback. Then, iterate on your product rapidly based on what you learn.
  4. Keep the Customer Involved: A central tenet of the book is the principle of ‘customer validation’. Keep your customers involved in your development process to ensure you’re creating a product that truly solves their problem.
  5. Stay Flexible: The authors stress the importance of adaptability in the face of unpredictable market behavior. Maintain a flexible approach to your business strategy to be able to respond effectively.
  6. Test your Hypotheses: Every assumption you make about your product and market is a hypothesis that needs to be tested. Avoid the trap of confirmation bias by rigorously testing your hypotheses against actual market data.
  7. Identify Key Metrics: Find the key metrics that will tell you if you’re moving in the right direction and measure them relentlessly. The right metrics will guide your decisions and keep you focused.
  8. Build-Measure-Learn: Adopt the ‘Build-Measure-Learn’ feedback loop. It’s a key component of the Lean Startup methodology and central to the Customer Development process. It encourages entrepreneurs to build, deliver, use feedback, and iterate until they arrive at the right product for the market.
  9. Segment Your Market: Not all customers are created equal. Segment your market to better tailor your product and messaging to different customer groups.
  10. Listen and Learn: Finally, always keep your ears to the ground. Listen to your customers, learn from them, and allow their feedback to shape the evolution of your product.