* The Great Gatsby does use the letter "e" extensively.
* There is no known book-length work written without the letter "e". This would be a truly remarkable feat, as "e" is the most common letter in the English language.
It's likely you're thinking of a famous literary challenge, known as the lipogram. A lipogram is a text that avoids using a particular letter.
While there are short stories and poems written without the letter "e", a full-length novel would be exceptionally difficult, if not impossible, to write without it.
Let me know if you have other literary trivia questions!