The poems in Sister Tongue explore negative spaces—the distance between twin sisters, between lovers, between Farsi and English, between the poet’s upbringing in California and her family in Iran. This space between vibrates with loss and longing, arcing with tension. Farnaz Fatemi’s poetry delves into the intricacies of the relational space between people, the depth of ancestral roots, and the visceral memories that shimmer beyond the reach of words.