Alternative Business Models in EM

Some interesting "new" models.
Some are public domain, but the majority are copyrighted based on adds.
Some, such as Freeload, seems to have some pretty well developed DRM protections,since they also offer paid-copies in different formats.

Models with Books in Public Domain

• Authorama
• Literature.org

Models with Copyrighted Books

• Freeload Press and TextBookMedia
• Bookboon
• Pharmpedia

Independent publishing

• Principles of Marketing
• Making Photographs
• Math Open Ref (geometry)
• Psychology 101
• The Open Life: Philosophy of Open Source
• The Scientist and Engineer's Guide to Digital Signal Processing