Update 24 July 2013
Been pondering how the term "Best Selling" ebook is bandied about and realized that this term refers to a NARROW set of topics or subject matter(when compared to BISAC listings in the 1000's of subjects). So with that in mind, IF Your Ebookchild does not fit in one of the popular 'pulp novel' subjects that lead most online "Best Selling" lists, then we recommend a Niche Marketing approach like what You may find with this Free Guide to building Your Own Ebook Marketing Map to Indie Bound Online Bookstores.
We monitor the reports from the key data warehousing ebook entities(Amazon, Kobo, IStore, Smashwords, et.al) through news reports, blog posts, and direct interaction(as in during BEA). Here is my unofficial summary of the key attributes of the top selling(whatever that means) subject or genres for the last 18 to 24 months(and perhaps for the next 12 to 18 months as well).
The 'Escape from Reality' Leading subects for Ebooks are(the digital envelope Please?)...
1. Romance Novels(confirmed by RWAA and Bowker report from 2011 & Direct interaction during BEA with RWAA executive director).
2. Sci Fi Thrillers(as in blood guts and gore). No surprise here since nerd herd revels in this genre.
3. Futuristic Mysteries(see 2 Above)
4. Crime, Fantasy, Humor(sick mostly)
So, do not bemoan that the ebook reading population resembles the Hidden nature of the subject matter, and do YOURself a Major favor.. DO NOT Fall for the build it and they will come protestations of the self appointed online ebook marketing gods and goddesses.
I speak from the leading edge of a learning curve that focuses on bringing 'Hidden Treasures' ebooks DIRECTLY to the inner communities, and the 'Pebbles in the Pond' 2nd and 3rd rings surrounding those extant and readily identifiable communities, through our 'It's a Jungle Out There' Ebook Tours (see this link for updates).
Just a word (well more than one) to the wise. Focus on the niche communities online which associate with Your topic, subject, genre or story line. You will like the adVenture that much more.
http://bit.ly/How2BuildUrOwnChannel4EbookChild is a fine place to begin that adVenture.
Until next brainstorm.
And then we have the Ebook4Good edition which comes with Hangout support here http://bit.ly/SocRespEbook2013
Please consider joining our Google + community for weekly Hangouts4Good http://bit.ly/Ebooks4Good
Have started on this Jungle Tour AdVenture in 2013.