Most authors use a text editor (Word or OpenOffice, LibreOffice, etc.). These are suitable for basic tasks and give a good issue with a little attention (especially if it is only text). But please do not forget that no printing office accepts Word format (doc, docx) material, because the texts appear a little differently on each computer, the pages and images slip.
Layout programs (such as InDesign) give much better results, but they also require more learning to use.
Our company prints only from PDF. Therefore, we ask for the final material either in PDF or we do the PDF conversion. In this case, the PDF will be returned to the customer for review.
This statement is surprising at first, but if a book fulfills some parameters, it could easily be true.
One of our clients gave a 240-page, illustrated technical book with pictures, which very quickly required 500 printed books. He brought the material in Word, with the average layout that is available in Word. The book was printed, but we talked over the author that it would be good for the publication to be redesigned.
Fortunately, the book sold well, so the author ordered proofreading, designing, and printing for another 500 copies. We did not change the size of the book, the font size, the size of the images, "just" in InDesign, we created a new edition with the rules of the layout design.
The consequence: The 240-page book became 170 pages. We managed to win exactly 70 pages without wanted to do it.
What did all this mean in money? Printing a new book with layout designing and proofreading was cheaper than printing an old book without designing. So if you have a book of which you want at least a few hundred copies and the book contains not only textual but also pictures and tables, don't hesitate to order it, it will come out cheaper than without it.
Experience shows that page numbers to the left on even pages and to the right on odd pages causes confusion and several problems. Solution: It is easier if the page numbers are centered on the margin.
In Word, it is difficult to set it e.g. to the first four pages have no page number, but the fifth page should begin with page number 5.
The same can be done e.g. also with blank pages in front of the chapters. It's nicer if it's completely blank, with no page number.
It often occurs that the Word SpellChecker does not find a mistake, but the text is still incorrect. Most typical where the proofreader founds 15-20 errors on a page without being reported by Word. The spelling and writing of the words are the typical mistakes. The solution here is also the proofreader who reads the text.