Before you spend a cent on marketing, you need to know who you're marketing to.
Age, platform, and reading habit for each sub-genre — so you know where to point your marketing.
Source: Circana BookScan 2024, Penguin Random House reader research, NPR Books.
The bar shows the share of each sub-genre's Amazon top 50 that's in Kindle Unlimited. High = readers are subscribers who binge. Low = they buy outright.
This is where readers actually find their next book — ranked by how many indie authors say it drives real sales. You don't need to be on all of them. Pick the top one or two for your sub-genre and go deep.
Source: Written Word Media 2025 Indie Author Survey + Circana BookScan data.