Peter Carlsson left Tesla in 2015 to spend more time with his family. But ideas and proposals kept coming in from investors and former colleagues. All his previous experiences pointed in the same direction – to build a large battery factory in Europe. Two years later he started Northvolt and in less than four years, Northvolt has gone from a pre-study to a finished product. This book tells the story of how Northvolt raised SEK 40 billion (€ 4bn) in order to take a leading position in battery manufacturing. It also tells the story of a changing industry.