Thanks!
310 karma · joined August 23, 2011
You can get the PDF downloadable link here: first100.yobenlee.com.
Will work on EPUB/MOBI formats!
Short answer: let the data do the talking. How big is the market? Have you driven paid/organic traffic to a landing page? Have you tested any funnels? Have you gotten feedback your prospective customers?
You can do all these things with a minimal investment.