Design features grid

	Easiest			Harder			Hardest
Feature	iBooks Author	EPUB2	Kindle Mobi	Web	EPUB3	KF8	App
Embedded font	✗	☁	✗	✓	✓	✓	✓
Basic typography	✓	✓	✓	✓	✓	✓	✓
Moderate typography	✓	✗	✗	✓	✓	✓	✓
Complex typography	✓	✗	✗	☁	☁	✗	✓
Margins	✓	✗	✗	✓	✗	✗	✓
Colour	✓	☁	☁	✓	✓	☁	✓
Basic design	✓	☁	☁	✓	✓	✓	✓
Design with layouts	✓	✗	✗	✓	☁	✗	✓
Complex design	✓	✗	✗	☁	✗	✗	✓
Hyperlinks	✓	☁	☁	✓	☁	☁	✓
Text selection	✓	☁	☁	✓	✓	☁	✓
Multimedia	✓	☁	☁	✓	✓	☁	✓
Text rendering	✓	☁	☁	☁	✓	✓	✓

You can find some notes and explanations on the grid in this Futurebook blog post.