Through the Looking-Glass was a book written by Lewis Carroll. Heather Lake and Annabel Lake read it together. (COMIC: The Broken Man)
Ace also read a copy of Through the Looking Glass, in the TARDIS. (PROSE: Cat's Cradle: Time's Crucible)
Behind the scenes Edit
Though it may not be made clear in the DWU, Through the Looking-Glass is the sequel to Alice in Wonderland.
The Eleventh Doctor quoted "The Walrus and the Carpenter", a poem in the novel, in The Rings of Akhaten when he explained to Merry Gejelh why she should not sacrifice herself to Akhaten.