My Book Has Chapter Heading Images.  Will Those Look Right?

It depends.  Sometimes we can, sometimes we cannot.  As we explained back in What are the Limits of eBook formatting?, there is no such thing as absolute vertical or horizontal positioning in an eBook.  If you used a picture of an apple, let’s say, as the letter “a” in every Chapter heading that had an “a,” it's possible that it would not come out perfectly.  Kindle e-ink devices, remember, do not allow for inline images, so it is highly likely that the layout won’t match your print layout perfectly. 

But...

However, many creative ideas can make the Chapter heads look very similar to the print book.  This is something to bear in mind when you are putting together your manuscript.   To show you how Chapter heads can work, see the below examples.  The first is a handbook for "The Hyster Sisters" in Kindle Fire format, with the chapter graphic; the second is the same book in Kindle e-ink format.  These work because the chapter images are above the chapter title.  They would also work if below. What does not work very well is when the image or graphic is incorporated in the same line as the text.