Niven is an uncommonly occurring given name for males but a very prominent surname for both adults and children (#19272 out of 150436, Top 13%). (2000 U.S. Census). Shown below is the baby name popularity of Niven for boys.
So, what length is the right one for a book? The average nonfiction book, if such a thing exists, runs about 50,000 to 75,000 words, but this can vary depending upon category. Biographies, for example, can run 200,000 words.
Total cost to get an ebook out there: $0 to $500 (bargain basement editing, cover art, and formatting) to a couple of thousand (professional copy editing, custom illustration, and formatting). It costs me around $1,500 to put out a new novel with the bulk of that going to my editor.