Someone wrote a 260 pages long novel without using a single word that contains the letter 'e'. That seems impossible to me.
Wikipedia has a page for "logology" which is apparently a term for the general activity of playing with language in that kind of way on a per-letter basis (so, including anagrams and palindromes, etc.)
is a noir/fantasy story, its actual plot is the story's lack of 'e'.
It's amazing. It's difficult and confusing to follow the writing, but it's an amazing book.