Voices Bright Flags is a series of experiments in what is sometimes called public poetry, with Brock's country, America, and his relation to it, as his main theme. The poems approach America from a range of perspectives — political, historical, and personal — and in a range of styles and voices, with each voice planting its own flag, as it were, implying its own America.

Together the poems form a partial (in both senses) mosaic, a discordant chorus, a succession of conversations and quarrels between the poet and the motley citizens of his imagination.