A Tale of a Tub
The first, second, and third editions of the "Tale" appeared in 1704; the fifth edition came out in 1710. In "The Apology for the &c.", Swift indicates that he originally gave his publisher a preliminary copy of the work, while he kept a blotted copy at his own hand and lent other copies including one to Thomas Swift, Jonathan's "parson cousin". As a consequence, the first edition appeared with many errors. The second edition was a resetting of the type. The third edition was a reprint of the second, with corrections, and the fourth edition contained corrections of the third.
A Swiftly Tilting Planet
Matthew Maddox's second novel, "The Horn of Joy" (1868), serves as a MacGuffin in "A Swiftly Tilting Planet". Charles Wallace spends a significant portion of the book trying to remember or discover what Maddox wrote in it, or to reach Maddox himself. Readers sometimes wonder whether "The Horn of Joy" ever existed; but it is a fictional book, created by L'Engle. Polly O'Keefe finds a copy of "The Horn of Joy" in her room (formerly Charles Wallace's room) when she visits her grandparents in "An Acceptable Time". Maddox's equally fictional first novel, "Once More United", is said to have been published in 1865.