People ask me constantly: What should I use to prep?
My answer is short. These four. Nothing else.
1. Decode and Conquer, 5th Edition — The Only PM Interview Book Built for 2026
Most PM interview resources are dangerously out of date. The frameworks, the question types, the expectations interviewers actually have — all of it has shifted, and the books and courses most candidates are using haven’t kept up.
This is the only resource I know of that’s been fully rebuilt for the modern era. Not updated. Not patched. Rebuilt from scratch. 528 pages of frameworks that reflect what PM interviews at Meta and other top companies actually look like today.
If you’re prepping with anything else, you’re studying for an interview that no longer exists.
2. Lewis Lin Question Bank
3,400+ real PM interview questions pulled from Meta, DoorDash, Anthropic, and hundreds of other companies. Crowdsourced since 2019, updated constantly. Before you practice answering, you need to know what you’re walking into. This is where you find out.
3. My Substack — Deep Dives
Once you know the questions, you need to see what a strong answer actually looks like. The Deep Dives are my professional model answers to the most commonly occurring PM interview questions at Meta and beyond — written the way I’d answer them if I were the candidate.
4. Lewis Lin Slack Group
The most underrated part of prep is finding a good practice partner — and that’s exactly what this community is for.
A lot of candidates try to substitute AI for practice partners. Don’t. AI doesn’t push back the way a real interviewer does. It’s too agreeable, too forgiving, and it can’t replicate the social pressure of a live interview. You need a human who’s been through it, will tell you when your answer is weak, and knows what “good” actually looks like.
That’s what this Slack is for.
That’s it. Skip the YouTube rabbit holes. Skip the AI chatbots confidently giving you wrong frameworks. These four resources are what actually moves the needle.