Which C.S. Lewis book contains the line “Further up and further in”?

The line “Further up and further in” appears in C.S. Lewis’s The Last Battle. Published in 1956, The Last Battle is the seventh and final novel in The Chronicles of Narnia.

In the book’s concluding movement, the phrase expresses a continuing advance into the deeper reality of Aslan’s country. Lewis repeats it as characters move onward, giving the words a memorable rhythm and a strong sense of spiritual progression. The phrase is therefore associated with the novel’s ending rather than with the series’ earlier portal adventure.

Readers sometimes connect the wording with The Great Divorce because both works use imaginative journeys to explore ideas about heaven, reality, and transformation. The Great Divorce is a separate 1945 theological fantasy, however, and does not contain the Narnia line. The Last Battle remains firmly within the Narnia cycle.

The novel’s place as the final published Narnia book also gives the phrase special significance. It functions as a concluding invitation to continue beyond apparent boundaries, echoing the series’ recurring movement from a familiar world into a larger one.