📖 Book
✓ Link checked
Paid
Beginner
Why we picked it
The single best thing ever written on customer conversations. It teaches you to ask about the customer's life and past behaviour, not your idea, so you can't be lied to. If a founder reads one thing before talking to a single customer, it's this.
From
momtestbook.com
by Rob Fitzpatrick
~130 pages
- Talk about their life, not your idea.
- Ask about specifics in the past, not opinions about the future.
- 'That's so cool, I'd totally buy it' is a compliment, not data, dig for commitment and evidence.
Open
momtestbook.com →
📖 Book
✓ Link checked
Paid
Intermediate
Why we picked it
This is the deepest practical treatment of pulling the job out of a customer's behavior rather than their words. Moesta reframes the work around the struggling moment and the progress a person is trying to make, then gives you the interview mechanics to surface it. If the video hooks you, this is where you go to actually run the method yourself.
From
Lioncrest Publishing
by Bob Moesta and Greg Engle
About 220 pages
- Start from the customer's struggling moment and the progress they want, not from your product.
- People rarely name the job, so you read it from the sequence of events and trade-offs in how they bought.
- Selling becomes helping someone buy: your job is to make their decision and their progress clearer.
Open
amazon.com →
✍️ Essay
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Free
Beginner
Why we picked it
The definitive essay on where good ideas come from: notice problems you personally have, don't force it. Use it as the lens for judging whether your idea is a real problem or a solution in search of one.
From
paulgraham.com
by Paul Graham
~20 min read
- Live in the future and build what's missing.
- The best ideas look like bad ideas at first (schleps and hard-to-explain).
- Start with problems you have, in a domain you actually know.
Open
paulgraham.com →
✍️ Essay
✓ Link checked
Free
Intermediate
Why we picked it
The essay that put 'product-market fit' into the startup vocabulary. Read it for the gut-level description of what PMF feels like when it's happening vs when it isn't, the intuition behind the metrics.
From
pmarchive.com
by Marc Andreessen
~15 min read
- Market matters most; a great market pulls product out of a startup.
- You can feel PMF, customers buy as fast as you can ship.
- Before PMF, do whatever it takes to get there; nothing else counts.
Open
pmarchive.com →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
Turns the vague feeling of product-market fit into a number you can move. Ask users how they would feel if they could no longer use the product, then track the share who say 'very disappointed'. Under 40 percent means keep working. A test you can run on an idea long before you scale it.
From
First Round Review
by Rahul Vohra
~20 min read
- The 40 percent 'very disappointed' benchmark for product-market fit.
- Segment to your high-expectation customers and build for them.
- Make the fit score a metric you improve quarter by quarter.
Open
review.firstround.com →
📄 Article
✓ Link checked
Freemium
Intermediate
Why we picked it
If you are selling to companies rather than consumers, this is the specific playbook. Four concrete ways founders got signal before building, from doing the job by hand for one customer to interviewing dozens of potential users first.
From
Lenny's Newsletter
by Lenny Rachitsky
~12 min read
- Do the job by hand for one real customer before automating.
- Interview a wide set of potential users before committing.
- B2B signal looks different from consumer signal.
Open
lennysnewsletter.com →
📄 Article
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Free
Intermediate
Why we picked it
The gap between a big market and a paying market is willingness to pay, and this piece gives you a rigorous way to actually measure it. It moves you past asking would you pay, a question that flatters you, toward methods that reveal a real number. Use it to put a price test in front of your quiet market before you assume the gap is a gift.
From
Kellogg Insight, Northwestern
by Kellogg Insight
~10 min read
- Stated interest overstates real willingness to pay
- Structured methods produce a defensible price a customer would actually accept
- A market only counts once someone will pay a real number
Open
insight.kellogg.northwestern.edu →
📄 Article
✓ Link checked
India
Free
Intermediate
Why we picked it
Shah argues that to make people switch from what they already use, you need a large jump in perceived efficiency, not a marginal one. In a crowded market that is the bar for your wedge: the incumbent may be good enough for most, so your narrow segment has to feel a dramatic gain. Read it to sanity check whether your improvement is big enough to change behavior.
From
SeedToScale (Accel India)
by Kunal Shah
~10 min read
- People only switch when the efficiency jump is large, not marginal
- Look for inefficiencies incumbents leave in place, not just problems
- A big enough delta makes the new behavior stick and spread
Open
seedtoscale.com →
📖 Book
✓ Link checked
Paid
Intermediate
Why we picked it
Dunford's whole method starts with the customers who already love your product, then turns that into positioning the entire team can repeat the same way. Her final step is literally capturing positioning so it can be shared, which is the exact problem you have once new hires start describing your customer in their own words. Read it when you want the ICP and the pitch to stay consistent from the founder down to the newest rep.
From
April Dunford
by April Dunford
Short book, about 200 pages
- Positioning should start from the specific customers who already get real value, not from a generic market.
- A shared positioning document is what keeps a growing team describing the same ideal customer.
- The book is battle tested across hundreds of B2B tech companies, so the process travels well beyond one industry.
Open
aprildunford.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
The idea that started the lean movement, from the person who coined it. No business plan survives first contact with customers, so stop defending assumptions at your desk and go test them on real people. Short, blunt, and foundational.
From
steveblank.com
by Steve Blank
~8 min read
- Your idea is a set of guesses until customers test it.
- Facts live outside the building, not in your plan.
- Expect to be wrong, and plan to learn from it.
Open
steveblank.com →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
This tackles the exact case where no budget line exists yet because the problem is new to buyers. Altman argues an unbudgeted problem can still be a real one if you help the buyer build the business case and find who controls the spend. It sharpens your short answer's key move: locate the person who owns, or could own, the budget.
From
Forbes
by Ian Altman
~8 min read
- No existing budget can mean a new problem, not a dead one
- Find the person who controls the spend, then build the case with them
- Help buyers quantify the cost of doing nothing to unlock budget
Open
forbes.com →
📄 Article
✓ Link checked
Free
Advanced
Why we picked it
If your market is real but latent, meaning the pain exists but no one is actively shopping, this is the playbook for creating demand rather than capturing it. It is honest about how much education and time that path costs, which helps you decide whether the gap is worth it. Read it to judge whether you are early to a real market or wrong about it.
From
Bessemer Venture Partners (Atlas)
by Bessemer Venture Partners
~15 min read
- Latent demand must be created, not just captured, and that is expensive
- Educate the buyer on a problem they have not named yet
- Weigh the cost of category creation against the size of the real pain
Open
bvp.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
The cleanest distillation of the one framework that turns a customer chat into a relationship instead of a survey. The three rules (talk about their life not your idea, ask about the past not hypotheticals, and chase real commitments of time, reputation, or money) are exactly how you get an early customer to tell you what nearly stopped them from buying and who else you should talk to. Rekhi is a product leader, so the examples are operator-grade, not book-report fluff.
From
Sachin Rekhi's Blog
by Sachin Rekhi
10 min read
- Never pitch your idea in the conversation; ask how they handle the problem today and what it costs them, so praise can't lie to you.
- The strongest signal is a commitment that costs them something: a trial, an intro to a colleague, or a pre-order.
- 'Would you buy this?' teaches you nothing; 'walk me through the last time you dealt with this' surfaces the real story and the referral.
Open
sachinrekhi.com →
Why we picked it
A short, practical field guide to customer discovery: who to talk to, how to find them, and how many. Pairs perfectly with The Mom Test, Fitzpatrick teaches the questions, Constable teaches the logistics.
From
talkingtohumans.com
by Giff Constable
~80 pages (free PDF available)
- Decide who you need to learn from before you start.
- Recruiting interviewees is a skill, scripts and channels included.
- Get out of the building; patterns emerge faster than you expect.
Open
talkingtohumans.com →
Why we picked it
The permission slip to recruit users by hand, do things manually, and deliver 'insanely great' experiences to your first few customers. The cheapest, most honest way to validate demand is to go get it one person at a time.
From
paulgraham.com
by Paul Graham
~15 min read
- Recruit your first users manually, don't wait for them to come.
- A tiny group of users who love you beats a big group who like you.
- Manual, unscalable effort early is a feature, not a failure.
Open
paulgraham.com →
