Cover of The Black Book of the Entrepreneur
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The Black Book of the Entrepreneur

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Fernando Trías de Bes writes «The Black Book of the Entrepreneur» from an unusual position in business literature: that of the economist who prefers to warn before encouraging.

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Spanish economist Fernando Trías de Bes catalogues the most common business failure factors in Spain: partner problems, lack of focus, cash flow management, single-customer overdependence, and positioning errors. Unlike most entrepreneurship books, he starts from failure rather than success, enabling readers to identify and avoid mistakes before making them.

Our review

Fernando Trías de Bes writes «The Black Book of the Entrepreneur» from an unusual position in business literature: that of the economist who prefers to warn before encouraging. Published in 2007, the book catalogues with dark humour and analytical rigour the factors that most frequently kill a business project in Spain, before the market or competition even arrive. Problems with co-founders — the most cited chapter — top the list: Trías de Bes argues that most companies fail due to internal conflicts stemming from a poor choice of partner, not from lack of product or market. This is followed by lack of strategic focus, poor cash flow management, the entrepreneur's inadequate psychological profile, and the confusion between having a good idea and having a viable business. The style is direct, ironic, and deliberately demystifying: the book does not aim to inspire, it aims to prevent. The most legitimate critique is that its perspective is heavily anchored in the Spanish context of the first decade of the 2000s, and some cultural patterns it describes have since evolved. Even so, it remains the most honest book on business failure available in Spanish.

Who it's for

Essential for anyone considering starting a business or taking on a co-founder; also useful for startup mentors and advisors who want to anticipate the most common risks facing their mentees.

Key takeaways

  • Choosing a co-founder is the most important and least analysed decision when starting a company; most failures are rooted in founder conflicts.
  • Having a good idea is not the same as having a business — market validation, margins, and cash flow are the real filters.
  • Cash flow kills profitable companies: a business can have accounting profits and run out of liquidity at the same time.
  • The entrepreneur's psychological profile matters as much as the business model; tolerance for ambiguity and discipline are rarer than they appear.
Fact

«El libro negro del emprendedor» was published by Empresa Activa (Grupo Planeta) in 2007 and has been reprinted multiple times, becoming one of the best-selling Spanish-language business books of its generation.

Topics Fernando Trías de Besfracaso empresarialemprendimientoEspañasocios