Hi Emily, glad you've discovered the joys of Lenormand! There was a thread awhile back in which the
Game of Destiny was discussed, here's a link:
http://www.tarotforum.net/showthread.php?t=86252&highlight=steinbach.
The Treppner course is wonderful. There have been some informative threads about it on Aeclectic over the past year.
(Edited to add a link to one of the Treppner threads:
http://www.tarotforum.net/showthread.php?t=88434&highlight=treppner
It's even easier to order the Treppner course now, because much of their website has been translated into English. The link to their site is included in the thread above.
...and a second edit to say that the Treppner course consists of several pdf files which, printed out, comprise a book - there are no lessons you have to submit or anything like that. I have found the course to be invaluable, both as a foundation for studying other approaches, and as a method to return to again and again.)