He is best known for his series of fictionalized biographies of Italian leaders in art and science, and for a volume of work that immortalizes traditions, values and ways of life of Tuscany and Florence.

For example, in his story of the fearless Domenico Tirbuzi, a Florentine Robin Hood of the poor masses, Ugolini preserves the dialogue, Tuscan dialect, and archaic words particular to the Maremma vernacular.

He was living as a second lieutenant after his graduation from the Military Academy of Modena and embarked in a law career for ten years, but this volume first publicly revealed Ugolini a poet.

The book of the then-unknown author earned high praise in La Nazione reviews by noted writers of that epoch that included Grazia Deledda and Giovanni Marradi.

"[3] After World War II, Ugolini concentrated on literary work for youths, creating the famous series of "Novelized Biographies" for the Paravia, Società Editrice Internazionale (SEI), and Minerva Italica publishing houses.

Through keen and warm humanization of great artists and leaders, original novels dedicated to "the young of all ages", and a breadth of genres that includes fantasy and science fiction,[4] Ugolini has influenced generations.

The Austrian Ministry of Education acknowledged Ugolini in the noted publication "Jugendbuch Autoren aus allen Welt," edited by Lucia Binder for Italy.

Ugolini's works have been translated into Japanese and most European languages (German, Romanian, Czech, Hungarian, Portuguese, Serb-Croatian, Spanish) and have won numerous literary prizes.

In English, the epigraph reads, "Here for many years the Florentine writer and poet Luigi Ugolini gave voice to the beauty and humanity of his land and his people.

In a preface About Luigi Ugolini (1965), his publisher, Paravia, added the comment: “His work adheres to its spirit and its inspiration, to the ancient region that always gave, by particular grace, the most iconic figures of art and science.

Because his work has, of the Maremma region, the ancient mysterious spell, like the luminous Florentine hills and the deep silences of Volterra.” Known as a poet whose writings were a flame to conscience and ethical thinking, Ugolini is remembered as a brave spirit who considered indifference among the most reprehensible of sins.

He is said to have packed his seven children into a car after a dishonest business manager lost their country villa, and to have lit a cigarette with a piece of money to show disdain for greed.