The Kalacakra Tantra was the last major Tantrik text written in India before the decline of Buddhism. The book has left indelible influence over different regions of Asia in last thousand years of its journey. Apart from the Vimalprabha commentary composed during the mid-11th century, there is no verse by verse commentary available to the general reader. Kumar has attempted translation of the full text from Sanskrit original and has also contributed a new detailed commentary. This book locates mysterious Sambhala and Oddiyana. The book further delves into the chronology of legendary Kalki kings.