
As an engineer eyeing PM roles, I got tired of $150/year newsletters and built a free interview-prep resource instead. Here's what's in it.
context: CSE engineer, started thinking about PM about 8 months ago. spent a couple of months reading everything I could find, hit the same wall every aspiring PM hits: serious content sits behind paywalls (Lenny $150/yr, Reforge $2,000+) and what's free is ad-stuffed listicles ranking the same ten books on every site.
so I ended up writing my own prep stack as I went. 14 days ago I shipped it as a free site for anyone in a similar spot. wanted to share what's in it that's specifically interview-prep relevant, since this question comes up a lot here.
for the behavioral / product-sense round
- 30 essential PM books with original reviews, not back-cover summaries. meta-commentary on what each book actually teaches, who it's for, what gets commonly misread. Inspired, Hooked, Lean Startup, The Mom Test, Continuous Discovery Habits, etc. — the ones that show up in every recommendation thread.
- the reviews are honest about which books are worth deep reading vs which you can skim — useful when you have 2 weeks before an interview, not 2 years.
for case study / product-thinking rounds
- 65 long-form case studies (7 paragraphs each, not bullet listicles). real product decisions documented: Apple iPhone's keyboard call, Slack's pivot from gaming, Razorpay's payment gateway shift, Zerodha bootstrapping, BYJU'S downfall, Discord pivoting from gaming chat. when interviewers ask "tell me about a product decision you admire," you have real material instead of generic.
- includes a strong Indian set (Cred, Razorpay, Zerodha, BYJU'S, Paytm, Meesho, Swiggy, Nykaa) — important if you're interviewing at Indian companies or want to discuss markets beyond SV.
for general PM craft
- 18 curated YouTube playlists across design, data, product analytics, marketing — for when you'd rather watch than read.
what's not on it
- mock interview questions (this isn't a leetcode-for-PM site)
- formulaic "answer this framework" templates (PM interviews reward judgment, not formulas)
- paid courses or affiliate funnels
honest disclosures
- the prose is AI-assisted (Claude). I curate, structure, and edit. credited to "northstar editorial," not a fake personal byline.
- the only monetization is Amazon affiliate links on book pages.
- it's free. no signup wall, no email gate.
happy to share what helped me most for specific rounds (case study, behavioral, product sense) if anyone here is mid-prep.