Ask HN: Best marketing/branding books?

Hi -- my partner and I have a recently funded startup and one of the "money guys" is very bottom line focused, challenging nearly every expense. We are trying to build the case that its worth it in the long run to have nice marketing materials, to have good design that taps into the 'cool' zetigeist and develop something that people will want to be a part of. Does anyone know of some good books on the subject that we can read and then use to bolster our case in the board room? thx