Originally Posted By: dweste
One curiosity is the original deals with 38 fallacies, while according to the comments, a new version for Christian teaching deals with only 36.

It looks like the 36 lesson title is most likely an earlier edition of the current 38 lesson title. The comments you refer to were from 2008 and the current edition is listed as the "2009 edition" on their product page. Amazon lists the 36 lesson edition as being published in 2003.

Based on this article from the MIT Tech, it would seem that the book was written by and marketed primarily to Christians but the content is largely free of any doctrinal content (the article does mention one exception).
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Victory awaits him who has everything in order — luck, people call it. Defeat is certain for him who has neglected to take the necessary precautions in time; this is called bad luck. Roald Amundsen