(from wikipedia "erewhon" article)
Erewhon, or Over the Range is a novel by Samuel Butler, published anonymously in 1872. The title is also the name of a country, supposedly discovered by the protagonist. In the novel, it is not revealed in which part of the world Erewhon is, but it is clear that it is a fictional country. Butler meant the title to be read as the word Nowhere backwards, even though the letters "h" and "w" are transposed. It is likely that he did this to protect himself from accusations of being unpatriotic, although Erewhon is obviously a satire of Victorian society.
The French philosopher Gilles Deleuze used ideas from Butler's book at various points in the development of his philosophy of difference.
In Difference and Repetition (1968), he refers to what he calls "Ideas" as "erewhons." "Ideas are not concepts," he explains, but rather "a form of eternally positive differential multiplicity, distinguished from the identity of concepts." "Erewhon" refers to the "nomadic distributions" that pertain to simulacra, which "are not universals like the categories, nor are they the hic et nunc or now here, the diversity to which categories apply in representation.". "Erewhon," in this reading, is "not only a disguised no-where but a rearranged now-here."