Feathers and Stones

I know Steven Holl reads Knut Hamsun, but is he also a Paul Auster fan?
From an Auster-centric post earlier this week, emphasis added:

The plot summary of the play reminded me of Paul Auster’s The Music of Chance. It’s the story of two incredibly eccentric billionaires, Feather and Stone (who are so rich that at times they feel immortal), who have decided to use their money to pursue some very peculiar passions.

The Nelson-Atkins Museum Extension Book:

Stone & Feather: Steven Holl Architects / Nelson-Atkins Museum Expansion.

Conicidence? Common metaphors? Or literary homage?