Ebooks are available for free download in both mobi and epub formats.

In His Steps by Charles M. Sheldon:
about In His Steps, mobi format for Kindles, epub format for most everything else.

The Heart Of The World by Charles M. Sheldon:
about The Heart of the World, mobi format for Kindles, epub format for most everything else.

Robert Hardy’s Seven Days by Charles M. Sheldon:
Robert Hardy’s Seven Days, mobi format for Kindles, epub format for most everything else.