Finding a market, testing it cheaply, and building a first product without a product team behind you.
A founder does product work under the hardest version of the constraints, being no research budget, nobody to delegate to, and a runway that sets the deadline for you. This list starts with the cheapest way to learn something true, works through the methods for searching out a business model, and finishes with the strategy and leadership reading for once that search is over. Most of it can be applied by one person in a week without asking anyone for permission.
Two hours to read and it changes your next ten conversations. Asking about someone's life and past behaviour rather than about your idea is the cheapest research method available to a founder with no budget.
Build measure learn, validated learning, innovation accounting and the pivot, argued end to end. Read it for the framing that most investors and advisers already carry into a meeting with you.
Olsen's six steps from target customer to tested prototype, with the Kano model and importance versus satisfaction analysis made usable. The most procedural route to product market fit on this list.
The Value Proposition Canvas, connecting customer jobs, pains and gains to what you actually offer. Designed to be worked through with a co founder in an afternoon rather than read alone.
Forty four experiments rated by cost, setup time and strength of evidence, so you can pick one that matches the decision in front of you and the runway you have left.
Blank's original customer development text, with entry and exit criteria for each of the four steps. The claim that a startup searches for a business model rather than executing a known one is the foundation the rest of this list rests on.
Nine building blocks covering segments, channels, revenue streams and cost structure, which is the picture an investor will ask you to draw anyway. Visual, and quick to work through as a founding team.
Thiel on doing something genuinely new, the power law in returns, and distribution as the function founders underrate. Deliberately provocative, and a useful counterweight when everyone around you is copying a competitor.
Fadell on the decisions themselves, from the difference between painkillers and vitamins through to pricing and whether to found a company at all. Short chapters, readable in any order between other things.
For the part nobody prepares you for, being the decisions with no good option on the table. Horowitz is free of formula and candid about layoffs, wartime leadership and the choice to sell.
The full procedural version of customer development, running to hundreds of pages of checklists. Not a book to read through, and the most complete treatment there is of searching for a business model.