You are a student
You have the entrepreneurial bug but need guidance, knowledge, ideas and tools you can apply with few resources.
NEW RELEASE · START FROM SCRATCH · SPANISH EDITION
Bitácora de un LEINNer
Start a business from scratch, even if you don’t have an idea or resources yet, and make your first sales in under 30 days.
Iván CarrilloMeet the author (in Spanish) ↗
I have launched more than 30 projects and invoiced more than €150,000. I have also lost money and spent months on offers nobody wanted. This book is everything I wish I had known when I started: real projects, what worked and what didn’t, and tools to get yours going.
Only €20. What is €20 if it finally gets your own project off the ground? Where to buy it.
The book is written in Spanish · Available on Amazon and Leanpub
THIS BOOK IS FOR YOU IF...
You want to start a business.
But where do you begin?
You want to take the leap, but you lack an idea, money or confidence. And it is easy to think that people who have made it have something you don’t.
I will show you how to start selling in under 30 days, even from scratch, without an idea or a product. With real projects, what worked and what didn’t, and tools to get yours going. So you can avoid the knocks I took.
You are a LEINNer
You want to learn from someone who has been there: what I tried, what went wrong and what I would do differently, so you can apply it to your projects or find direction.
You work for a company
You would like to intrapreneur or start your own business, but you are afraid of risking everything. You need to test small before taking the leap.
START TODAY · FREE SAMPLE IN SPANISH
Read a few pages.
Or listen to them.
Read 72 pages for free: the full introduction and first chapter, with the layout of the final edition. No sign-up. The sample, like the book, is in Spanish.
The sample covers what you need to take the leap: spot a problem someone would pay to solve, find your first potential customers and rule out a bad opportunity before spending money.
Prefer adaptable text? Read the HTML version of the sample ↗ or download the PDF ↗.
NARRATED SAMPLE · IN SPANISH
Listen to the introduction and chapter 1.
From the title and author to the end of chapter 1. Use the controls to pause, skip or change the speed.
Speed
Authorised synthetic voice of Iván Carrillo
Download MP3 audio ↗ 57.1 MB
How this narration was made
I used an original recording of my voice as a reference to generate this narration with artificial intelligence. It is a synthetic voice, used with my authorisation.
Tool: voxcpm 2.0.3 package. Model: VoxCPM2, by OpenBMB, with code and weights under Apache-2.0.
Text © 2026 Iván Carrillo. Edition and design © 2026 hardMent. The sample is free to listen to and download.
SAMPLE · 72 PAGES · SPANISH
Read the sample right here
Browse the introduction and first chapter with the layout of the final edition. Use the arrows or open the page index.
72 pages · Sample of the final edition · Full notes and references are in the complete edition. Text © 2026 Iván Carrillo · Edition and design © 2026 hardMent.
WHAT YOU WILL LEARN
Six chapters to go
from zero to your project.
Each chapter is a step on the path: what I learned from real projects, what went wrong and the tools to apply it to yours.
Find a problem
Spot a problem someone would pay to solve, find your first potential customers and rule out a bad opportunity before spending money.
Understand value
Discover what your customer really needs, stand out from what they already buy and explain why they should choose you.
Test a solution
Test your idea with minimal investment, tell a “like” from an intention to buy and prepare a first offer you can deliver.
Make it happen again
Get conversations with potential buyers, handle objections and ask for the close, and turn what you learn into the next sale.
Make the business sustainable
Know how much you really earn on each sale, calculate what you need to sell to cover costs and spot when cash is running short and what to change.
Find out how far you can grow
Share responsibilities without losing control, turn goals into concrete commitments and lead a team that delivers on what was agreed.
THE COMPLETE BOOK
Take the leap.
Only €20. What is €20 if it finally gets your own project off the ground? The book is written in Spanish.
LEANPUB GUARANTEE
60 days to decide
If you buy on Leanpub and the book is not right for you, you can request a refund within 60 days of purchase from your Leanpub account.
Read the refund policy ↗You can read or listen to the sample before buying. Each store shows the final price and applicable taxes at checkout.
THE ENTREPRENEUR’S PATH
A six-step path.
One project that keeps growing.
Follow the six chapters as stages of a single path: from the first idea to a project that can grow.
CHAPTER 01
Find a problem
Identify a problem that someone needs to solve.
CHAPTER 02
Understand value
Understand the customer and build a distinctive value proposition.
CHAPTER 03
Test a solution
Design a solution and validate it with minimal resources.
CHAPTER 04
Make it happen again
Make your first 10 sales.
CHAPTER 05
Make the business sustainable
Design a profitable business model.
CHAPTER 06
Find out how far you can grow
Lead, work as a team and meet goals.
Want to explore more? everleinner.com ↗ hosts the book’s log, idea map and glossary (in Spanish).