The History of The Hobbit is a two-volume study of J. R. R. Tolkien's 1937 children's fantasy novel The Hobbit. It was first published by HarperCollins in 2007. It contains Tolkien's unpublished drafts of the novel, with commentary by John D. Rateliff.^[1] It details Tolkien's various revisions to The Hobbit, including abandoned revisions for the unpublished third edition of the work, intended for 1960, as well as previously unpublished original maps and illustrations drawn by Tolkien.^[2]

The work provides the same sort of literary analysis of The Hobbit that Christopher Tolkien's 12-volume The History of Middle-earth provides for The Silmarillion and The Lord of the Rings. In Rateliff's view, the work is complementary to Douglas A. Anderson's 1988 work The Annotated Hobbit, which presents and comments upon a single text of the novel.

The Tolkien scholar Tom Shippey welcomed the book, noting that until its appearance, the best-known history of The Hobbit was contained in Humphrey Carpenter's 1977 biography of Tolkien, which was clear, famous, and left several questions unanswered. Rateliff's account goes into much greater detail. Shippey commented that the two volumes "lead us into the very engine-room of [Tolkien's] creation."^[3] He was surprised to discover that Tolkien was initially "rather unconcerned about names"; for instance, Thorin's grandfather, who made the map of the Lonely Mountain, was initially called "Fimbulfambi" rather than "the appropriately dwarvish name Thror". "Fimbulfambi" is Eddic, but it means "great fool, a person who cannot make conversation".^[3] Shippey discussed whether the text of The Hobbit could now be described as final, given all the variants that Rateliff documents, and noting Tolkien's struggles with the mistaken corrections made by proof-readers and copy-editors; he concluded that it was possibly now time to leave the text alone. He added that they "will take a great deal of digesting", providing "vital primary evidence for scholarship" and "great entertainment" for Tolkien fans.^[3]

Jason Fisher, reviewing the book for Mythlore, said it was worth the very long wait (from 1991), describing the account as "riveting". The book had three purposes: to present the earliest manuscript version; to show that it was, pace Christopher Tolkien, connected to the tradition of The Silmarillion; and to examine both Tolkien's revision of 1947 giving the familiar text, and his abandoned 1960 rewrite, which would have refashioned the whole book "to bring it into greater harmony with the mood, language, and geography of The Lord of the Rings." Fisher describes the books' layout as "meticulously systematic" and comparable to Christopher Tolkien's History of Middle-earth. He finds the book rich in "wonderful surprises", among them that Thorin Oakenshield would have been Gandalf the Dwarf, while the Wizard of that name would have been called Bladorthin; and Tolkien considered having Bilbo Baggins the hobbit navigate Mirkwood using a ball of rolled-up spider silk "like Theseus in the Minotaur's labyrinth". He enjoyed, too, the appendices with previously unpublished illustrations, including a facsimile of the Dwarves' letter which Bilbo found under the clock on his mantelpiece. For Fisher, however, the most interesting addition was the unfinished 1960 rewrite of the first three chapters, adding detail of passing through Bree, for example, but losing much of the humour. In his view, it was just as well that Tolkien abandoned the attempt. He was more critical of Rateliff's essays, which he found generally but not uniformly illuminating and erudite. All the same, the book was in his view ambitious, brilliant, and indispensable.^[6]