Interesting business model for eBook

Earli­er this week I found an eBook over on Zen­Hab­its. The book looks inter­est­ing and I’m look­ing for­ward to giv­ing it a read, but the think that caught my eye was the busi­ness mod­el; you can get the book for free. The whole book, as a down­load­able eBook. Free. Now, there is a Premi­um ver­sion […]