While there are many websites that claim to offer a "Free PDF," the situation is generally as follows:
While a free PDF is convenient for quick reading, it is highly recommended to purchase a physical copy if you intend to perform the Saptaha Parayana . Reading from a physical book is considered more respectful and conducive to concentration (Dhyana) during the ritualistic reading.
The text covers 52 chapters, detailing everything from removing ancestral curses (Pitru Dosha) to the attainment of self-realization.