typically defined as books sold in electronic format - typically in a closed binary form
- alternative: free work like Project Gutenberg and Brewster Kahle's various projects. Often (was) referred to as E Text-s
- 50 sources
online "markets" - esp good for Self Publishing
- related: Print On Demand, Lulu, Amazon
- DRM-free http://drmfree.calibre-ebook.com/
- z-lib: https://book4you.org https://1lib.us https://b-ok.cc/ part of https://z-lib.org/?
- Internet Archive - sometimes has an epub OCR when everyone else just has PDF
a special case has been those designed for dedicated hardware (e.g. Kindle)
HyperCard was an early tool for authoring these
http://drinkmalk.com/ - for commercial titles you already own
Will Text-Books go this direction?
Does Wikipedia count?