I regularly typeset financial books, yearbooks & reports.
Editors usually send me Word documents, along with associated tables & figures (mostly in Excel files). I then typeset these and send proofs back to the editor, until the author(s) have approved everything. I will redraw tables, figures & equations that are not suitable for printing. Once all is approved I send one final press-ready file, which the editor/publisher can then forward onto the printers.