The book "L.E.J. Brouwer - Topologist, Intuitionist, Philosopher" by Dirk van Dalen offers a comprehensive biography of the Dutch mathematician and philosopher Luitzen Egbertus Jan Brouwer. It highlights his fascinating life and significant contributions to mathematics, particularly in the field of topology. Brouwer was known for his profound intuitive insights and his controversial views, which made him a prominent figure in 20th-century mathematics. The biography addresses not only his scientific achievements, such as the Brouwer Fixed Point Theorem, but also his role in the foundational discussions of mathematics, where he introduced the constructive methods of intuitionism. Furthermore, it discusses his international perspective and his engagement in the scientific community during the turbulent period between the world wars. This updated edition combines the previous two volumes into a single work and is aimed at mathematicians as well as anyone interested in the history of mathematics in the 20th century.