Applying the principles both of poetic (based on the work of D. N. Freedman) and rhetorical (based on the work of J. Muilenberg) analysis, Bartelt examines in detail the style and structure of Isaiah 2-12. He finds that the structure of this segment of Isaiah is based on 800 eight-syllable lines, with the core of the section the so-called Book of Immanuel (Isaiah 6-8). The latter is ringed by two concentric circles that share structural devices and thematic motifs.