Author

Books by Jacob Lund Fisker

Jacob Lund Fisker is a Danish physicist who achieved financial independence in his early thirties after five years of working in the United States and saving at an extreme rate. He founded the Early Retirement Extreme blog in 2007 and published the book version in 2010, several years before the FIRE movement achieved mainstream visibility. He holds a PhD in astrophysics from the University of Aarhus. After retiring he returned to work as a quantitative trader, a decision he discusses as consistent with the book's framework rather than a contradiction of it. He approaches personal finance with the same rigor he applied to physics.