As I recently read all four of the Rabbit novels (and Rabbit Remembered) in paperback, I borrowed the Tetralogy from the library only to read Updike's Introduction, explaining his work on the four novels. And I'm glad I read the Intro, as Updike reveals therein that the Tetralogy version of Rabbit Redux has reinserted a lengthy passage, featuring Rabbit, Run's Rev. Jack Eccles, edited out of the original version, and thus not found in any printing of Redux issued up until the Tetralogy. The passage occurs very near the end of Section II, "Jill"; as originally published, Rabbit leaves his parents' home and takes the bus back to his house, with the bus trip taking only two paragraphs. In the Intro of the Tetralogy, though, Updike writes that he "ha[s] restored to Redux an omitted brief appearance by Jack Eccles, who almost became the co-protagonist of Rabbit's first outing, and whose own 'outing' seemed to deserve a place in the full report." The Tetralogy's version of Redux thus contains the omitted passage, in which Rabbit and Rev. Eccles run into each other on the bus and engage in a long conversation as to what each has been up to the past 10 years. Considering Eccles' importance to the first novel, I was delighted to read his reappearance in Redux and am curious as why this passage was edited in the first place. For this reason alone, Tetralogy's version of Redux is worth a look, even if you've read Redux separately.