Fro a book that will be print in black white,Is black white images better than colorful in this case?
It depends, are you the one publishing it or is someone else? If it’s someone else it’s best to provide it in color as they will know the kind of chrome levelling and color adjustment that will be required to get the best possible look and feel on the end printed page. However if you’re the one publishing it, you can simply do the job yourself. Why not try printing one color and one monochrome version, see which looks the best on a printed page?