This is the first book on Einthoven in the English language; two earlier extensive reviews of his life and work were published in Dutch by his former co workers Hoogerwerf and de Waart, in 1946 and 1957 respectively; the latter provides a brief summary in English; the former also wrote a succinct article on 73 Einthoven in English. 74 Hoogerwerf's review mentioned above was published as a chapter in "Helden der Wetenschap" i. e. "Heroes of Science," a book on Dutch Nobel Prize winners which has a somewhat romantic character corresponding 108 with the title. On the other hand, de Waart's book...