The full modern English title for the work commonly known as Pantagruel is The Horrible and Terrifying Deeds and Words of the Very Renowned Pantagruel King of the Dipsodes, Son of the Great Giant Gargantua and in French, Les horribles et épouvantables faits et prouesses du très renommé Pantagruel Roi des Dipsodes, fils du Grand Géant Gargantua. The original title of the work was Pantagruel roy des dipsodes restitué à son naturel avec ses faictz et prouesses espoventables. Although most modern editions of Rabelais's work place Pantagruel as the second volume of a series, it was actually published first, around 1532 under the pen name "Alcofribas Nasier", an anagram of François Rabelais. Pantagruel was a sequel to an anonymous book entitled The Great Chronicles of the Great and Enormous Giant Gargantua (in French, Les Grandes Chroniques du Grand et Enorme Géant Gargantua). This early Gargantua text enjoyed great popularity, despite its rather poor construction. Rabelais's giants are not described as being of any fixed height, as in the first two books of Gulliver's Travels, but vary in size from chapter to chapter to enable a series of astonishing images as though these were tall tales. For example, in one chapter Pantagruel is able to fit into a courtroom to argue a case, but in another the narrator resides inside Pantagruel's mouth for 6 months and discovers an entire nation living around his teeth.
At the beginning of this book, Gargantua's wife dies giving birth to Pantagruel, who grows to be as giant and scholarly as his father. Rabelais gives a catalog of his reading, mostly humorously-titled books, and judgements in nonsensical legal cases. "The lion’s share of Pantagruel’s seventh chapter consists of a concluding catalog attributed to the Abbey of Saint-Victor", states Bodemer in his essay, "Rabelais and the Abbey of Saint-Victor Revisited."  He befriends hard-partying jokester Panurge. Together with a group of friends, they intoxicate an army of invading giants, burn their camp, and drown survivors in urine. Epistemon, decapitated in the fray, recovers when Panurge sews his head back to his body. He reports that souls in hell are poorly paid and work bad jobs, but that's the extent of their torments. Another battle is missed by the narrator, who is exploring the civilization in Pantagruel's mouth at the time.
After the success of Pantagruel, Rabelais revisited and revised his source material. He produced an improved narrative of the life and acts of Pantagruel's father in The Very Horrific Life of Great Gargantua, Father of Pantagruel (in French, La vie très horrifique du grand Gargantua, père de Pantagruel), commonly known as Gargantua. This volume begins with the miraculous birth of Gargantua after an 11-month pregnancy. The labor is so difficult, his mother threatens to castrate his father, Lord Grandgousier. The giant Gargantua is born calling for ale and with a yard-long erection, which provides much amusement to his female nurses in later chapters. After some indifferent education at home, he is sent to Paris where the crowds so annoy him that he drowns thousands of them in a flood of urine (the survivors laugh so much, the city is renamed "Par Ris"). He steals the bells of St. Anthony, but gives them back after a sophist makes ludicrously self-centered appeals for their return. While he studies diligently in Paris, the neighboring Lord Picrochole's bakers insult and are attacked by Grandgousier's grape-growers. A massive retaliatory strike against Grandgousier's lands is finally halted at Seville by the merciless Friar John. Grandgousier sues for peace, but Picrochole arrogantly rebuffs him. Gargantua and Friar John rally the troops and (after Gargantua nearly swallows 6 pilgrims who accidentally fell in his salad) they win a great battle, drive Picrochole back to his city, then overthrow it. As a reward, Friar John is given funds to establish the "anti-church" Abbey of Thélème, which has become one of the most notable parables in Western philosophy. It can be considered a point-by-point critique of the educational practices of the age, or a call for free schooling, or a defense of all sorts of notions on human nature.
The Third Book
Rabelais then returned to the story of Pantagruel himself in the last three books. In The Third Book of Pantagruel (in French, Le tiers-livre de Pantagruel; the original title is Le tiers livre des faicts et dicts héroïques du bon Pantagruel), the narrative style changes to a parody of the philosophical dialogue, where the earthy Panurge gets the last word. He sermonizes against moral restraint and in favor of indebtedness, yet accepts Pantagruel's offer to repay all of his creditors. Now financially solvent for the first time, Panurge stops wearing his long codpiece and seeks advice about whom to marry. Various auguries (opening Virgil to a random page, inducing prophetic dream through half-hearted fasting) and councilors (the Sibyl of Panzoust, the mute Goatnose, the old poet Raminagrobis, Friar John, a group of learned doctors and lawyers, and a fool) all agree that if he marries, his wife will cheat on him, beat him, and rob him; but he egregiously reinterprets their prophecies in a more favorable light. In a brief interlude, Pantagruel defends Judge Brindlegoose, who has pronounced sentence by rolling dice for 40 years, on the grounds that he is an old idiot and therefore favored by Fortune. As a last attempt to settle the question of marriage, Pantagruel and Panurge take a sea voyage to consult the Oracle of Bacbuc ("Divine Bottle"). Their ship is well-provisioned with the phallic herb Pantagruelion, for which Rabelais gives a ribald natural history.
The Fourth Book
The sea voyage continues for the whole of The Fourth Book of Pantagruel (in French, Le quart-livre de Pantagruel; the original title is Le quart livre des faicts et dicts héroïques du bon Pantagruel). The whole book can be seen as a comical retelling of the Odyssey, or of the story of Jason and the Argonauts. In The Fourth Book, perhaps his most satirical, Rabelais criticizes what he perceived as the arrogance and wealth of the Roman Catholic Church, the political figures of the time, and popular superstitions, and he addresses several religious, political, linguistic, and philosophical issues.
The group sail to East Asia, and buy many exotic animals. Panurge quarrels with the sheep merchant Dingdong, and takes his revenge by drowning him and his flock. They pass by the islands of the Bailiffs, whose peasants charge to be beaten. During a terrible storm at sea, Panurge is paralyzed with fear, but feigns insufferable bravura afterwards. After slaying a sea-monster, and being informed of the death of the giant Lent, they arrive at Wild Island, where the half-sausage inhabitants (called Chitterlings) mistake Pantagruel for their enemy Lent and attack. The battle is stopped by a divine winged pig, who excretes mustard on the battlefield. They proceed to Ruach, whose people eat air; barren Pope-Figland where a farmer and his wife outwit the devil; and the arrogantly catholic Papimania, where the people worship the Pope and his Decretals. After sailing through a cloud of frozen words and sounds, they come to an island that worships Gaster, the god of food. The book ends when Pantagruel fires a salute at the island of the Muses, and Panurge befouls himself for fear of the sound, and of the "celebrated cat Rodilardus".
The Fifth Book
The Fifth Book of Pantagruel (in French, Le cinquième-livre de Pantagruel; the original title is Le cinquiesme et dernier livre des faicts et dicts héroïques du bon Pantagruel), was published posthumously around 1564, and chronicles the further journeyings of Pantagruel and his friends. At Ringing Island, the company find birds living in the same hierarchy as the Catholic church. On Tool Island, the people are so fat they slit their skin to allow the fat to puff out. At the next island they are imprisoned by Furred Law-Cats, and escape only by answering a riddle. Nearby, they find an island of lawyers who nourish themselves on protracted court cases. In the Queendom of Whims, they uncomprehendingly watch a living-figure chess match with the miracle-working and prolix Queen Quintessence. Passing by the abbey of the sexually prolific Semiquavers, and the Elephants and monstrous Hearsay of Satin Island, they come to the realms of darkness. Led by a guide from Lanternland, they go deep below the earth to the oracle of Bacbuc. After much admiring of the architecture and many religious ceremonies, they come to the sacred bottle itself. It utters the one word "trinc". After drinking liquid text from a book of interpretation, Panurge concludes wine inspires him to right action, and he forthwith vows to marry as quickly and as often as possible.
Although some parts of book 5 are truly worthy of Rabelais, the last volume's attribution to him is debatable. Book five was not published until nine years after Rabelais's death and includes much material that is clearly borrowed (such as from Lucian's True History and Francesco Colonna's Hypnerotomachia Poliphili) or of lesser quality than the previous books. In the notes to his translation of Gargantua and Pantagruel, Donald M. Frame proposes that book 5 may have been formed from unfinished material that a publisher later patched together into a book. This interpretation has been mainly proved by Mireille Huchon in "Rabelais Grammairien", the first book to provide a rigorous grammatical analysis on the matter.
Penguin Classics in its introduction,by J.M.Cohen stated that chapters 17-48 were by another hand,using notes left by Rabelais and the general drift of what Rabelais did write of book 5.