For the past two millennia, no significant progress has been made to improve methods used in the calculations of circles. Due to the transcendence of pi, the inner and outer dimensions of the circle were never calculated with precision, only approximately. The numeric facts were never reconciled with the geometric facts. But a breakthrough comes forth as author Lionel Fabius presents his thoroughly researched work on circles, Pi, Monads, and the Quasi-circle Theory. After some intensive and extensive study, he provides a brilliant tool that centers on circles from a numerical point of view. His concept on monad conjecture, which represents the backbone of his quasi-circle theory, allows us to compute the dimensions of a circle with unprecedented methods of calculations. His work on the circle may affect some of the fundamental concepts found in basic mathematics and may even change your view of Pi as an irrational number.