''Eunoia'', which means ''beautiful thinking'', is the shortest English word to contain all five vowels. This book also contains them all, except that each one appears by itself in its own chapter. A unique personality for each vowel soon emerges: A is courtly, E is elegiac, I is lyrical, O is jocular, U is obscene. A triumphant feat, seven years in the making, Eunoia is as playful as it is awe-inspiring.