I’m working on a book, written in American English for an American market. I’ve asked a Canadian author to contribute an article which will be included in its entirety in the book and attributed to her. She uses the colour spelling, while the rest of the book uses color – should I change the spelling throughout her article to color to conform to the house style or leave it as is?
Changing the spelling of a single word, in multiple places, from British to American English seems odd. Enforcing a particular writing style (e.g., American English) on all authors is fairly common. Ideally, you will have a professional copy editor edit the book. The copy editor will need to be given stylistic guidelines including spelling, word usage, abbreviation, citing, referencing, numbering and many other aspects. Once the chapter has been copy edited, it should be returned to the author for her final approval.