Through the Looking-Glass, and What Alice Found There (also known as Alice Through the Looking-Glass or simply Through the Looking-Glass) is an 1871 novel by Lewis Carroll and the sequel to Alice's Adventures in Wonderland (1865).
Both the novel Giant's Bread and the book Come, Tell Me How You Live references a line in Haddocks' Eyes, a song sung by The White Knight.
In the novel The Clocks, Poirot quotes from the poem The Walrus and the Carpenter.
When walking on a path through a shrubbery at the Grange, Bobby Jones comes to think of a similar path described in the book. (Why Didn't They Ask Evans?)