Anyone who has never formatted a book has no idea how tedious it is.
Writing is the good part. The problem comes afterwards: margins, spacing, chapter breaks, table of contents. The whole book has to be clean for publication. The tools out there are either expensive or they lock your text into a single format, their way.
I was in the middle of my second book when I decided I would not go through that the hard way again.
Livretto
I built my own editor for writing and formatting books. The way I wanted to work, without depending on anyone else's tool.
The proof that it works is as direct as it gets: I formatted Narrativa em KPI, my second book, inside it.
The ruler
There is one criterion I use for everything now: a product that gets used is worth more than a product that gets shown off.
Livretto is not a pretty screenshot in a post. It is a tool that solved a real problem of mine, and that will solve it again on the next book. When you build to use, and not to impress, quality shows up on its own.
If you want to write a book in a light, easy and visually interesting way: https://livretto.online/