[marshie250]

Sure. I opened a book file with the calibre editor and deleted some text, and then changed the author's name to random gibberish. Then, I ran "Overwrite Always" on that book. The author's name stayed gibberish, and the missing text was still gone. I tried it on a couple of books just to make sure. Expected outcome: author's name corrected and chapter with missing text overwritten.

Deleted chapters also did not redownload when running Overwrite always. The other update methods did redownload any missing chapters, however.