This particular book titled ‘Shivaswaroopam’ which contains
the stories of Hindu God Shiva was published by the Travancore Devasawom Board.
Sreyas foundation dedicated to the propagation and preservation of Hindu
culture has published the pdf version of the book. You can download it for
free. Several important stories which are part of Shiva Purana and other
Shaivaite texts are part of the book.
You can download Shivaswaroopam here.