How to find out what is worth building, from interview technique through to running experiments that settle a question.
Discovery is the work of reducing what you do not know before you commit engineering time to it. These books cover the three parts of that separately, being how to talk to people, how to structure what you learn, and how to test an idea cheaply enough that being wrong costs little.
The one to start with. Gives discovery a weekly rhythm and an artefact, so it survives contact with a delivery schedule.
The rules for a customer conversation that produces facts instead of encouragement. Short enough to read before your next interview.
The craft of the interview itself, covering rapport, silence and follow up. Pairs with The Mom Test, which covers what to ask rather than how.
Forty four experiments with cost, setup time and evidence strength rated, so you can pick one that matches the decision you are making.
How to do the research yourself, including when a survey is the wrong instrument and how much evidence is actually enough.
Jobs to Be Done in full. Changes what you look for in an interview by moving attention to the circumstance rather than the person.
A six step route from target customer to tested prototype, with the Kano model and importance versus satisfaction analysis made practical.
Five days to go from a problem to a tested prototype. Worth it for the decision making structure even if you never run the full week.
Once discovery moves to live traffic, this is the reference on running experiments that will not mislead you.