Readers can’t tell you why one book “feels” more professional than another, but they feel it on every page. Nearly always, it’s the typesetting doing the work they can’t see. Here are the rules that separate a made book from an exported document.

Widows and orphans

A widow is the last line of a paragraph stranded alone at the top of a page. An orphan is the first line of a paragraph stranded at the bottom, with the rest overleaf. Both look like a mistake even to people who’ve never heard the terms.

Good typesetting quietly pushes or pulls a line to avoid them, usually by nudging the whole page a hair looser or tighter. Word doesn’t really do this, which is why Word-exported books are full of lonely lines nobody meant to strand.

Justification and hyphenation

Book body text is justified, both edges flush. That only looks even if the typesetter allows real hyphenation. Without it, the software stretches the word spaces to fill each line, and you get those ugly gaping gaps that make a paragraph look moth-eaten.

The fix is a proper hyphenation dictionary breaking long words at the right points. This is the single biggest reason justified Word text looks amateur and justified book text looks calm. Same alignment, completely different result.

Rivers

When the gaps between words happen to line up vertically down several lines, they form a “river” of white space that the eye follows instead of reading the words. Once you’ve seen one you can’t unsee it. Even hyphenation and good spacing are what prevent them, which is another argument for not fighting your justification by hand.

Baseline, leading, and running heads

The stuff you never notice because it’s right: every line of text sits on a consistent baseline grid, the leading (space between lines) is even, running heads and page numbers (folios) sit in the same place on every page, and chapter openings drop to a consistent point down the page. Break any of these and the book feels subtly restless, even if the reader can’t say why.

The point

None of this is about being fancy. It’s about a book not tripping the reader’s “something’s wrong here” alarm. Galley sets all of this the way a typesetter would: correct hyphenation, managed widows and orphans, a consistent baseline. The export looks made, not exported, without you learning any of it by hand. You even see it while you write, not only at export.

For the vocabulary, anatomy of a book page names every part of the page described above, and dashes, hyphens and ellipses settles the three marks that cause the most trouble in a manuscript.