Start with The Mom Test when you need better questions for your next customer conversation. Choose Continuous Discovery Habits when you need to make research a team habit, or Competing Against Luck when you need to understand why customers choose one alternative over another.
These books solve different parts of discovery. Interview technique improves what you hear; a discovery cadence connects that evidence to product choices; a jobs-to-be-done lens helps explain the circumstances behind demand. Reading all three is less urgent than identifying which of those steps is currently failing.
Which book fits your situation?
The Mom Test
Rob Fitzpatrick
- Choose it when
- Your interviews produce praise but little evidence.
- What it contributes
- Fitzpatrick shifts the conversation from opinions about your idea to specific past events, existing workarounds, and meaningful next steps.
- Try this next
- Rewrite three future-tense questions as questions about the last time the problem happened.
- Where it falls short
- Better interviews alone do not establish market size, retention, or willingness to pay.
Continuous Discovery Habits
Teresa Torres
- Choose it when
- Research happens occasionally and rarely changes the roadmap.
- What it contributes
- Torres connects regular customer touchpoints, opportunity mapping, and assumption tests to a desired product outcome.
- Try this next
- Choose one outcome and map the opportunities behind it before committing to a solution.
- Where it falls short
- A meeting cadence becomes ceremony if evidence never changes a product choice.
Competing Against Luck
Clayton M. Christensen, Taddy Hall, Karen Dillon, and David S. Duncan
- Choose it when
- You know who buys but not why they switch or stay.
- What it contributes
- Christensen and his coauthors focus on the progress people seek in a particular circumstance, including alternatives and anxieties.
- Try this next
- Reconstruct one recent purchase or abandonment, including the option of doing nothing.
- Where it falls short
- A plausible job story is a hypothesis to test, not proof of a causal explanation.
Where to start
For a first interview, read The Mom Test digest and use the question guide below. Once conversations become regular, use Continuous Discovery Habits to connect them to decisions. Add Competing Against Luck when the unresolved question is customer choice rather than interview wording.
Put the reading to work
Before a call, write the decision you need to make and one observation that would change it. Afterward, separate the customer’s account, your interpretation, and the next test. This is our practical synthesis of the books, not a verbatim author worksheet.
The selection, comparisons, and exercises are our editorial synthesis of the linked digests, not quotations or worksheets supplied by the authors. These are starting points, not a complete survey of the field.