Paradise Lost is an epic poem in blank verse by the 17th-century English poet John Milton (1608–1674). The first version, published in 1667, consisted of ten books with over ten thousand lines of verse. A second edition followed in 1674, arranged into twelve books (in the manner of Virgil's Aeneid) with minor revisions throughout and a note on the versification. It is considered by critics to be Milton's "major work", and helped solidify his reputation as one of the greatest English poets of his time.

The poem concerns the Biblical story of the Fall of Man: the temptation of Adam and Eve by the fallen angel Satan and their expulsion from the Garden of Eden. Milton's purpose, stated in Book I, is to "justify the ways of God to men"

Short Summary:

The poem is separated into twelve "books" or sections, the lengths of which vary greatly (the longest is Book IX, with 1,189 lines, and the shortest Book VII, with 640). The Arguments at the head of each book were added in subsequent imprints of the first edition. Originally published in ten books, a fully "Revised and Augmented" edition reorganized into twelve books was issued in 1674, and this is the edition generally used today.

The poem follows the epic tradition of starting in medias res (Latin for in the midst of things), the background story being recounted later.

Milton's story has two narrative arcs, one about Satan (Lucifer) and the other following Adam and Eve. It begins after Satan and the other rebel angels have been defeated and banished to Hell, or, as it is also called in the poem, Tartarus. In Pandæmonium, Satan employs his rhetorical skill to organise his followers; he is aided by Mammon and Beelzebub. Belial and Moloch are also present. At the end of the debate, Satan volunteers to poison the newly created Earth and God's new and most favoured creation, Mankind. He braves the dangers of the Abyss alone in a manner reminiscent of Odysseus or Aeneas.

After an arduous traversal of the Chaos outside Hell, he enters God's new material World, and later the Garden of Eden.

At several points in the poem, an Angelic War over Heaven is recounted from different perspectives. Satan's rebellion follows the epic convention of large-scale warfare. The battles between the faithful angels and Satan's forces take place over three days. At the final battle, the Son of God single-handedly defeats the entire legion of angelic rebels and banishes them from Heaven. Following this purge, God creates the World, culminating in his creation of Adam and Eve. While God gave Adam and Eve total freedom and power to rule over all creation, He gave them one explicit command: not to eat from the Tree of the knowledge of good and evil on penalty of death.