📖 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
Advanced
Why we picked it
The foundational text of customer development, 'get out of the building' started here and became the backbone of the Lean Startup. Steve Blank's own site is the primary source.
From
steveblank.com
by Steve Blank
~370 pages
- The biggest risk isn't building wrong tech, it's building something nobody wants
- Customer discovery: test your hypotheses with real customers before scaling
- Separate customer development from product development as parallel processes
- Search for a repeatable business model before you try to execute one
Open
steveblank.com →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
Ash Maurya, author of Running Lean, argues you can always find how a customer solves a job today, and that existing workaround is your evidence. The piece gives you the switching forces (push, pull, inertia, friction) to read whether the pain is urgent enough that someone would actually change and pay. It is a concrete, interview ready way to separate a real painkiller from a vitamin.
From
LEANFoundry
by Ash Maurya
About a 10 minute read
- Every job already has an existing alternative (even a spreadsheet or a manual hack); if you cannot find one, the problem may not be real.
- How hard the current workaround is, and what would make someone abandon it, tells you the true urgency and willingness to pay.
- Pull the problem out of the customer's actual recent story rather than asking them to predict future behavior.
Open
leanfoundry.com →
📖 Book
✓ Link checked
Paid
Intermediate
Why we picked it
A hands-on companion to The Mom Test with more structure on who to talk to and how to run the process. Alvarez is strong on separating what customers say they want from what they actually need and will pay for. Practical scripts and a repeatable five-step loop.
From
Cindy Alvarez
by Cindy Alvarez
~240 pages
- Find customers and their problems before building.
- Distinguish wants from needs.
- Build continuous learning into how you work.
Open
cindyalvarez.com →
📖 Book
✓ Link checked
Free
Beginner
Why we picked it
A free, short predecessor to The Right It for when you want the method without buying a book. It lays out cheap experiments (fake buttons, manual concierge, pre-orders) that reveal whether people will act, not just nod. Worth reading before you spend a single rupee on building.
From
pretotyping.org
by Alberto Savoia
~90 pages
- Test the core experience with the smallest possible time and money.
- Watch what people do when asked to commit, not what they say.
- A single well-run experiment can kill or confirm an idea in a day.
Open
pretotyping.org →
📖 Book
✓ Link checked
Paid
Intermediate
Why we picked it
Hall's book gives you the research discipline behind good interviewing: how to avoid leading a witness, how to write a discussion guide, and how to separate what you observed from what you interpreted. It's aimed at product teams generally, so it's broader than customer development books, but the interviewing chapters translate directly to founder conversations. It's a fast read and cuts the fluff other research books carry.
From
A Book Apart / Erika Hall
by Erika Hall
~120 pages
- Write your questions down in advance, improvising under pressure tends to lead the witness.
- Separate your notes into said, did, and your interpretation, don't blend them.
- A clear purpose statement and informed consent make people more honest, not less.
Open
abookapart.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
To say no to the right requests you need feedback you can trust, and this shows how to get it by watching customers rather than just taking their asks. It reinforces that observing the struggle tells you more than the feature name they hand you. Practical field technique for separating a stated want from a real need.
From
First Round Review
by Michael Sippey
12 min read
- Watch what customers do, not only what they ask for
- Get close to the actual struggle to find the real problem
- Stated requests are a starting point for questions, not a spec
Open
review.firstround.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
A step-by-step guide to running discovery when you have almost no data, aimed squarely at first-time founders. It is practical on finding people to talk to and asking in a way that surfaces truth rather than encouragement. A solid starting point before your first batch of interviews.
From
First Round Review
by Jeanette Mellinger
15 min read
- Start discovery before you have a product.
- Recruit the right people to talk to.
- Ask so customers can safely tell you no.
Open
review.firstround.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
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 →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
A concise reference sheet that names the exact failure modes this question is about: leading questions like wouldn't you agree and hypothetical ones like would you buy this, with the fix, ask about the last time it happened, spelled out plainly. It's short enough to reread before every batch of interviews. Good as a one page checklist alongside the longer books on this list.
From
Harvard Business School, Rock Center for Entrepreneurship
5 min read
- Avoid leading questions (wouldn't you agree) and hypothetical questions (would you buy) entirely.
- Ask tell me about the last time you, instead of asking for an opinion or a prediction.
- Watch for emotion and frustration in the answer, that's the signal, not the words themselves.
Open
entrepreneurship.hbs.edu →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
This is the practical how-to for actually running the weekly cadence, covering the part most founders get stuck on: recruiting people and making sense of what they said. Torres favors story based interviews where you ask about a specific recent instance rather than generalities. Use it as your operating manual for keeping a steady interview stream alive.
From
Product Talk
by Teresa Torres
- Ask about a specific recent story, not what people 'usually' do
- Automate recruiting so scheduling never becomes the reason you stop
- Synthesize every few interviews so learning does not pile up unused
Open
producttalk.org →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
Torres makes the single most important move concrete: instead of asking what people generally do, ask them to tell you about a specific recent time it happened. Because memory beats opinion, a real story surfaces the pain and context you would otherwise lead them toward. This is the practical heart of talking about their past, not your future.
From
Product Talk
by Teresa Torres
15 min read
- Ask 'tell me about the last time', not 'do you usually'
- Specific stories expose real behaviour, opinions hide it
- Let the customer do most of the talking through the story
Open
producttalk.org →
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 →
✍️ Essay
Free
Intermediate
Why we picked it
Alvarez names the specific mistakes founders make even after reading the theory: multi part questions that let people dodge the hard part, and would you like questions that get a free, meaningless yes. It's short, specific, and reads like a checklist to run through after a bad interview to figure out what went wrong. Good to reread after a round of calls that felt too easy.
From
cindyalvarez.com
by Cindy Alvarez
8 min read
- Never ask would you like, wanting is free and everyone says yes.
- Split multi part questions into one question at a time, or people answer only the easy half.
- Prepare yourself for an answer you don't want to hear, or you'll unconsciously steer away from it.
Open
cindyalvarez.com →
