Singer (b. 1947) is an American journalist, software developer, and author of The Untethered Soul (2007) and other books on spiritual matters, including The Surrender Experiment (2015) and Living Untethered (2022). He became interested in spiritual wisdom in the 1970s, drawing inspiration from the influential Indian yogi Paramahansa Yogananda, author of Autobiography of a Yogi (1946).

Singer received a master’s degree in economics in 1971 from the University of Florida and earned his doctorate one year later after submitting the book The Search for Truth (1974) to his supervisor in lieu of writing a formal dissertation. Along with other American followers of Paramahansa Yogananda, Singer built a meditation hall called Temple of the Universe in Alachua, Florida, in 1975. The temple is still open and runs a schedule of programs of meditation, chanting, and yoga, including regular lectures by Singer himself. He co-founded the Medical Manager Corporation in 1981, later renamed Greenway Health, a software marketing business for medical professionals that was bought by WebMD in 2002. Singer stayed on with WebMD as a vice president working on physician software strategies before leaving the company in 2005. Singer faced legal trouble after his departure from WebMD, but the charges against him were eventually dropped.