Panchasidhanthika of Varaahamihira (2 editions)N B S Kottayam(Indiaye_kandethal)
First published in 1991 .Second Edition in 2000.
It is a comparative study of the five sidhantha of Indian astronomy with modern concepts of Astrophysics. Varahamihira, a contemporary of Kalidasa,
and astronomer in Ujjaini had compared the theories of astronomy which existed before him in an
exhaustive and scientific manner