Now a repeat freebie @ B&N, Kobo (not available to Canadians this time around), and ChristianBook (same links as OP).
Newly free @
Amazon UK (new ASIN, they probably replaced a Topaz file, and slated to drop in the
main store after midnight Pacific Time),
iTunes &
Google Play (both available to Canadians), and can be added to your library @
BookShout (online reading & in-app download).