Basics of "why ebooks look different"

[elf]

Print books are a page-based layout medium. What the producer puts on the page is what the receiver sees, barring exotic technological interventions. (Colored filters for dyslexic readers, magnifying lenses, complex projectors that put the content up on a large screen... whatever. Those aren't how most books are read.)

Ebooks, on the other hand, are a tagged-language medium. What the producer creates is the suggestion of format; what the receiver views is filtered through hardware and software to display something like that intent. In order to make reflowable text, able to grow or shrink or display sideways in the device, the creator can't decide exactly where the line breaks go, how deep the margins are, and how many words fit on a page. The exact appearance of the ebook will be based somewhat on the software and hardware used to read it.

( This is a very basic overview of what kind of things make ebooks look different from each other & from print books. )