L. E. J. Brouwer's Intuitionism: A Revolution in Two Installments
by Dirk van Dalen
Professor van Dalen is one of the leading authorities on Intuitionism. He and Troelstra wrote the definite two volume book on the foundations of constructive mathematics, Constructivity in Mathematics.
He also has edited Brouwer's 1907 Doctoral Thesis and other works.
Professor van Dalen is an active logician with several results about the intuitionistic continuum.