Press releases for non fiction

The Timeless Secret to Creating Bestselling Niche Non-Fiction (2006-01-02)
It is quite an achievement when a niche non-fiction book remains consistently at the top of the bestseller lists for a period spanning six months; an achievement that is all the more difficult to fathom when you consider that the subject matter has nothing to do with sex, drugs, rock and roll or the like; subject matter that might even be regarded as mundane in the extreme.