I tried using Kindle Create on Illegal Aliens – you can, from pdf, include all sorts of neat fonts and things like that.
I repeat, don’t.
You’ll get a non-reflowable book and one that is too large to set to 0.99 (and thus misses promo’s).
The only solution is to republish as a second edition. The kindle creator, starting from docx, etc files, can handle text dividers and things like that easily. It does a surprisingly good job of formatting and is worth using.