back in late October 2015, i checked out an ebook from the library of What Pet Should I Get by Dr Seuss (the new one they discovered). only it wasn't "Available" for my Kindle Keyboard, so i could only look at it only on my web browser.
(another example of Amazon trying to disenfranchise older Kindle models; but not mine!)
26 screen-grabs later, i had myself the beginnings of an ebook.
the screen grabs were TIFFs -- not my favorite, but pretty high resolution at least: 2880 x 1800.
i trimmed off the excess borders, making them 2528 x 1720 -- lookin' good! (high resolution, good color, etc.)
then i popped them into Adobe Acrobat Pro (using the largest combine-documents setting), rotated them 90 degrees counterclockwise (so that the wide two-page spread would automatically appear the long way on the Kindle, which means holding it sideways instead of up & down), and saved as a PDF.
7.1 Mb -- perfect! (not too big, not too small.)
the final step is putting in the Kindle documents folder and restarting the Kindle -- it looks great!
(sure, it's in black & white on the Kindle; but way better than nothing. and if i want it in color, i can always look at the PDF on my computer!)
another primo ebook! forget Amazon -- what do they know?