Contents • • • • • History [ ] Although the book was first published in 1965, Tirthaji had been propagating the techniques since much earlier, through lectures and classes. He wrote the book in 1957.: 10 It was published in 1965, five years after his death as 367 pages in forty chapters. Reprints were made in 1975 and 1978 with fewer typographical errors. Several reprints have been made since the 1990s.: 6 Contents [ ] The book contains sixteen and fifteen sub-sutras, each of which lists a mental calculation technique. • ^ (December 2006). Originally published as a 2-part article in Frontline, 22 October and 5 November 1993. The updated version appears in Kandasamy and Smarandache (2006).