David Dorsey ( Literary Structure of the Old Testament, The: A Commentary on Genesis-Malachi 
A. Condemnation, pleading, promise of future restoration, 1:1-12:6
B. Oracles to the nations, 13:1-26:21
C. Woes, 27:1-35:10
D. historical narrative, 36:1-39:8
C’. Yahweh triumphs over idols, 40:1-48:22
B’. Servant Songs, 49:1-54:17
A’. Condemnation, pleading, promise of future restoration, 55:1-66:24
He draws out the connections between the sections as follows:
A/A’: Both condemn empty liturgical practices, liturgical practice without justice (1:12-15; 58:1-14; 66:3). In both, Yahweh threatens to hide away because the hands of the people are full of blood (1:15; 59:1-3). Both sections also speak of briers and thorns. In A, the references to thorns and briars all have to do with the Lord turning the land desolate, with the desertification of the garden land (Isaiah 5:6; 7:23, 24, 25; 9:8), while in the A’ the Lord promises to replace the thorns with cypress and thus to restore the land to its prosperity (55:13). Both refer to Sabbaths (1:13; 56:2, 3, 6; 58:13; 66:23) – eight references in all, and framing the entire book. Both refer to the reconciliation of wolf and lamb, lion and ox, and the end of harm on Yahweh’s holy mountain (11:6; 65:25).
B/B’: The B section is a series of ten oracles against various Gentile nations, which are divided into two cycles of 5. The sequence begins with two chapters about Babylon, emphasizing the pride of Babylon and its eventual fall; Babylon comes back in the middle of the section (21:1-17), and then again at the end, this time described as the “lofty city” (24:1ff). The king of Babylon and Babylon itself represent the main rival to the city of God for the salvation of the world. The contrast with the servant of the Lord is marked. Dorsey notes various other connections: B predicts the end of singing and the beginning of mourning (chs. 15-16), while in the B’ section the people are full of rejoicing at the Lord’s restoration of the nations (49:13; 51:3, 11; 52:7-10; 54:1); both include exhortations to those who are dead (26:19; 51:9, 11; 52:1). Both refer to Sheol or the pot (14:15, 19; 51:14); nature rejoices at the end of Babylon (14:7-8; 49:12-13); Babylon’s children are cut off (14:20-22), while Israel’s children are restored (49:19-23); Babylon does not let his prisoner’s go (14:17), while Yahweh calls prisoners out (49:9). He also points to a series of contrasts between the King of Babylon in chapter 14 and Yahweh’s servant.
C/C’: Both of these sections warn against the misplacement of trust. C includes warnings against going to Egypt to find help against the Assyrians or Babylonians (31:1-3)’; in the C’ section, the warming is specifically against trusting idols. The connection indicates that the reliance on Egypt is itself a kind of idolatry. Several verbal connections link together these sections: Isaiah warns against relying on the “help” ( ‘zr ) of Egypt (30:5, 7; 31:1, 2, 3) and the later section warns against trusting in the help ( ‘zr ) of idols (41:10, 13, 14); Egypt’s help brings no “profit” (30:5-6), and neither dfoes idolatry (44:9-10); trusting Egypt will lead to shame (30:3, 5) and so will trysting idols (42:17); Egypt is merely human and not God (31:3), and the idols are also not-gods (44:6, 8-11); the vanity/vaporousness of Egypt’s help (30:7) is parallel to the emptiness of idols (41:44, 12, 24 29; 44:9). Both use the image of the potter and clay (29:16; 45:9; cf. 64:8). Chapters 35 and 40 are woven closely together by a series of verbal parallels: wilderness/desert (35:1; 40:3); way through wilderness (35:6-7; 40:3-4); flowers (35:1-2; 40:6-7); Lebanon (35:2; 40:16); “our God” (35:2; 40:3, 8); glory of Yahweh (35:2; 40:5); a highway or road in the desert (35:6-8; 40:3).
D: The central narrative section is embedded between these two passages about trust, about political trust and about liturgical trust. They are linked by the message from the Assyrians, who urged Hezekiah and his people to abandon trust in Yahweh to deliver them from their political threats. Hezekiah trusts Yahweh, and the city is delivered. This is a lesson to the exiles who are the focus of the second half of the prophecy: If you trust Yahweh the Redeemer, He will restore you to the land.
