Decode and Conquer, 4th Edition is the world's first book focused on product management (PM) interviews.

Brand new 4th edition

Now in its fourth edition, Decode and Conquer is the most current and up-to-date book on PM interviews.

It reflects all the latest changes to the PM interview process – with plenty of frameworks, examples, and lessons built in.

Decode and Conquer will help you build confidence and master PM interviews, widely considered as some of the most difficult interviews in the tech industry.

Featuring the world-famous CIRCLES method™

Decode and Conquer demystifies the PM interview including tricky case questions like:

  • Product Design

  • Technical

  • Estimations & Market Sizing

  • Pricing

  • Metrics & Execution

  • Tradeoff

  • A/B Testing

  • New Market Entry

  • Strategy

  • Product Vision

  • …and more

Decode and Conquer is known for its easy-to-use frameworks — including CIRCLES, AARM, and DIGS — that help candidates tackle an extensive range of case interview scenarios.

About Lewis C. Lin


Lewis C. Lin is the world’s #1 authority on product management interviews. His students include undergrads, MBAs, and experienced hires from the world’s top institutions including:

  • University of Pennsylvania’s Wharton School

  • Northwestern University’s Kellogg School of Management

  • University of Chicago’s Booth School of Business

  • UCLA’s Anderson School of Management

  • NYU’s Stern School of Business

Lewis’ students and clients have received job offers from top companies including Google, Facebook, Amazon, Uber, Spotify, and Shopify.

Tools and Strategies for Interview and Beyond

No matter what company you’re targeting, Decode and Conquer offers proven frameworks like CIRCLES to help you improve, develop good interview habits, and ultimately get the offers for the dream jobs you deserve.

If you’re not getting the job offers you want, the problem isn’t you. The problem is that you do not have a clear plan on how to prepare. Let Decode and Conquer help you.

Decode and Conquer will transform the way you approach interviews. You’ll gain the tools and strategies to be successful both in the interview and on the job.