Quote:
Originally Posted by Psymon
Well, I don't have a Kindle (yet), but obviously I'm already on my way to doing okay (I think -- or hope!) as far as iBooks go. Any thoughts on publishing ONLY for just iBooks and Kindle, and that's it?
Right now, the thought of designing for "everything" is a bit much, but even down the road -- if/when I got a handle on those two -- it just seems like such an utter pain in the butt to always design for half a dozen (or more) platforms.
I want to be HAPPY in life, much more than I want to be rich or "popular". 
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You can do what you want.

(and where you see the $$)
But I think you are leaving out a large number of older devices (monochrome,E-INK)
ADE EPUB was the sole standard of many public Libraries until recently.
I suggest you stop by various format forums and read the limitations and features of your targeted formats. (you have used some elegant HTML code, but not every device supports all that. ADE 1.7 (EPUB2) has lots of

to avoid. different brands add more gotchas to that mix)
Those huge , Apple endorsed images sizes are probably chosen to deliberately choke older devices

I use a cover around 300x500 for a 600x800 EINK display. The cover is more than just visable, even when the device makes it fill the screen.
Remember: A cover is only 1 page in the book. The reader is going to spend most of their time NOT on the cover page.