Link: https://en.wikipedia.org/wiki/Lipogram

Now focus your mind vigorously on this paragraph and on all its words. What’s so unusual about it? Don’t just zip through it quickly. Go through it slowly. Tax your brain as much as you can.

One of the most remarkable examples of a lipogram is Ernest Vincent Wright's novel Gadsby (1939), which has over 50,000 words but not a single letter E. Wright's self-imposed rule prohibited such common English words as the and he, plurals ending in -es, past tenses ending in -ed, and even abbreviations like Mr. (since it is short for Mister) or Rob (for Robert). Yet the narration flows fairly smoothly, and the book was praised by critics for its literary merits.

Interest in lipograms was rekindled by Georges Perec's novel La Disparition (1969) (openly inspired by Wright's Gadsby) and its English translation A Void by Gilbert Adair. Both works are missing the letter E, which is the most common letter in French as well as in English. A Turkish translation is likewise missing the letter E, while the Spanish translation instead omits the letter A, the second most common letter in that language. Perec subsequently wrote Les Revenentes (1972), a novel that uses no vowels except for E. Perec was a member of Oulipo, a group of French authors who adopted a variety of constraints in their work. La Disparition is, to date, the longest lipogram in existence.

A lipogram (from Ancient Greek: λειπογράμματος, leipográmmatos, "leaving out a letter") is a kind of constrained writing or word game consisting of writing paragraphs or longer works in which a particular letter or group of letters is avoided. Extended Ancient Greek texts avoiding the letter sigma are the earliest examples of lipograms.

The Greek poets from late antiquity Nestor of Laranda and Tryphiodorus wrote lipogrammatic adaptations of the Homeric poems: Nestor composed an Iliad, which was followed by Tryphiodorus' Odyssey. Both Nestor's Iliad and Tryphiodorus' Odyssey were composed of 24 books (like the original Iliad and Odyssey) each book omitting a subsequent letter of the Greek alphabet. Therefore, the first book omitted alpha, the second beta, the third gamma, and so forth.