The book is available at: Project Gutenberg, Internet Archive, Hathi Trust, Google Books. There is also a free Kindle ebook, and you can get a free audiobook from LibriVox.
Table of Contents
I. Savitri
II. Lakshman
III. Jogadhya Uma
IV. The Royal Ascetic and the Hind
V. Dhruva
VI. Buttoo
VII. Sindhu
VIII. Prehlad
IX. Sîta