Question: What Austrian-born American physicist wrote a 1975 book which was a bestseller in the United States?
Context: Siegfried Fred Singer (born September 27, 1924) is an Austrian-born American physicist and emeritus professor of environmental science at the University of Virginia.  Singer trained as an atmospheric physicist and is known for his work in space research, atmospheric pollution, rocket and satellite technology, his questioning of the link between UV-B and melanoma rates, and that between CFCs and stratospheric ozone loss, his public downplaying of the health risks of passive smoking, and as an advocate for climate change denial.  He is the author or editor of several books including "Global Effects of Environmental Pollution" (1970), "The Ocean in Human Affairs" (1989), "Global Climate Change" (1989), "The Greenhouse Debate Continued" (1992), and "Hot Talk, Cold Science" (1997).  He has also co-authored "" (2007) with Dennis Avery, and "Climate Change Reconsidered" (2009) with Craig Idso. Gustav Bergmann (May 4, 1906 – April 21, 1987) was an Austrian-born American philosopher.  He studied at the University of Vienna and was a member of the Vienna Circle.  In the United States, he was a professor of philosophy and psychology at the University of Iowa. Fritjof Capra (born February 1, 1939) is an Austrian-born American physicist.  In 1995, he became a founding director of the Center for Ecoliteracy in Berkeley, California.  He is on the faculty of Schumacher College. Maurice Goldhaber (April 18, 1911 – May 11, 2011) was an Austrian-born American physicist, who in 1957 (with Lee Grodzins and Andrew Sunyar) established that neutrinos have negative helicity. Herbert Penzl, born September 2, 1910 in Neufelden, Austria, died September 1st, 1995 in Oakland, California, was an Austrian-born American philologist and historical linguist.  He studied English Philology at the University of Vienna under Karl Luick.  In 1934 he completed his Ph.D. dissertation "The Development of Middle English a in New England Speech".  He spent some time in the United States working on the "Linguistic Atlas of the United States and Canada" at Brown University, having been recommended for the exchange by Sigmund Freud.  While in the US, he published his first article, "New England Terms for Poached Eggs," which received media coverage by the Associated Press among others. Ernst Rabel (January 28, 1874 – September 7, 1955) was an Austrian-born American scholar of Roman law, German private law, and comparative law, who, as the founding director of the Kaiser Wilhelm Institute for Foreign and International Private Law, in Berlin, achieved international recognition in the period between the World Wars, before being forced into retirement under the Nazi regime, and emigrating to the United States, in 1939.  In the field of comparative law his methodological perspectives, particularly as articulated and disseminated by his students, including , , and , were influential in the development of the "functional" or "function/context" methodology that became standard in Europe, the United States, and elsewhere in the world, in the post-World War II era.  His work in Germany in the 1930s in the area of the law of the sale of goods provided a model for later postwar efforts to develop a uniform world-wide sales law. Wolfe Kelman (November 27, 1923 – June 26, 1990) was an Austrian-born American Rabbi and leader in the Conservative Judaism in the United States who never led a congregation, serving for decades as a mentor to hundreds of rabbis in his role as the executive vice president of the Rabbinical Assembly, where he also prepared the initial steps for the rabbinic ordination of women in the Conservative movement. Erich Leinsdorf (born Erich Landauer; February 4, 1912 – September 11, 1993) was an Austrian-born American conductor.  He performed and recorded with leading orchestras and opera companies throughout the United States and Europe, earning a reputation for exacting standards as well as an acerbic personality.  He also published books and essays on musical matters. Raina Fehl (August 23, 1920 — May 3, 2009) was an Austrian-born American classicist, writer and editor.  She immigrated to the United States, 1939.  United States citizen since 1944.  U.S. Army Service 1945-1946, Psychiatric Social Worker, U.S. War Department, Research Analyst, Nuremberg War Crimes Trials, 1946-1947.  Married Philipp Fehl December 11, 1945.  Mother of two daughters, Katharine, "Kathy Fehl", and Caroline Coulston.  She died May 3, 2009, in Appleton, Wisconsin She is buried near family at The Eternal Home Cemetery,Block 1540, Row A, Space 6, Colma California. The Tao of Physics: An Exploration of the Parallels Between Modern Physics and Eastern Mysticism is a 1975 book by physicist Fritjof Capra.  It was a bestseller in the United States and has been published in 43 editions in 23 languages.  The fourth edition in English was published in 2000.
Answer: Fritjof Capra