Leaves of Grass by Walt Whitman

Inspired by transcendentalism, Whitman's immortal collection includes some of the greatest poems of modern times, including his masterpiece "Song of Myself." Shattering standard conventions of symbolism and allegory, it stands as an unabashed celebration of body and nature.

Animal Farm by George Orwell

The short novel is dystopian allegory in which animals play the roles of the Bolshevik revolutionaries and overthrow and oust the human owner of a farm (Manor Farm), renaming it Animal Farm and setting it up as a commune in which, at first, all animals are equal; however, class and status disparities soon emerge between the different animal species (the pigs being the "greater species"). The novel describes how a society's ideologies can be manipulated and twisted by those in positions of social and political power, including how Utopian society is made impossible by the corrupting nature of the very power necessary to create it.
The novel addresses not only the corruption of revolution by its leaders but also highlights how wickedness in human nature (indifference, ignorance, greed and myopia) destroys any possibility of Utopia. While this novel deigns poor leadership as the flaw in revolution (and not the revolution of itself), it also shows how ignorance and indifference to problems within a revolution let the horrors happen.

Moby-Dick by Herman Melville

On a previous voyage, a mysterious white whale had ripped off the leg of a sea captain named Ahab. Now the crew of the Pequod, on a pursuit that features constant adventure and horrendous mishaps, must follow the mad Ahab into the abyss to satisfy his unslakeable thirst for vengeance. Narrated by the cunningly observant crew member Ishmael,Moby-Dick is the tale of the hunt for the elusive, omnipotent, and ultimately mystifying white whale—Moby Dick.

On its surface, Moby-Dick is a vivid documentary of life aboard a nineteenth-century whaler, a virtual encyclopedia of whales and whaling, replete with facts, legends, and trivia that Melville had gleaned from personal experience and scores of sources. But as the quest for the whale becomes increasingly perilous, the tale works on allegorical levels, likening the whale to human greed, moral consequence, good, evil, and life itself. Who is good? The great white whale who, like Nature, asks nothing but to be left in peace? Or the bold Ahab who, like scientists, explorers, and philosophers, fearlessly probes the mysteries of the universe? Who is evil? The ferocious, man-killing sea monster? Or the revenge-obsessed madman who ignores his own better nature in his quest to kill the beast?

Scorned by critics upon its publication, Moby-Dick was publicly derided during its author’s lifetime. Yet Melville’s masterpiece has outlived its initial misunderstanding to become an American classic of unquestionably epic proportions.

Lord of the Flies by William Golding

Waiting for Godot: A Tragicomedy in Two Acts by Samuel Beckett

A seminal work of twentieth century drama, Waiting for Godot was Samuel Beckett's first professionally produced play. It opened in Paris in 1953 at the tiny Left Bank Theatre de Babylone, and has since become a cornerstone of twentieth-century theater. The story line revolves around two seemingly homeless men waiting for someone — or something — named Godot. Vladimir and Estragon wait near a tree on a barren stretch of road, inhabiting a drama spun from their own consciousness. The result is a comical wordplay of poetry, dreamscapes, and nonsense, which has been interpreted as a somber summation of mankind's inexhaustible search for meaning. Beckett's language pioneered an expressionistic minimalism that captured the existentialism of post-World War II Europe. His play remains one of the most magical and beautiful allegories of our time.