This isn't a biography; it is an adventure story!
Of course, Chesterton would have scoffed at calling this small book a biography in any case. But what it severely lacks in biographical data (which, of course, was not the author's aim) it makes up for in immense creative use of certain significant events in the great saint's life. Between dinner with St. Louis and his arguments against the Augustinians, to choosing the life of a poor Dominican monk instead of following the rich life of an abbot supplied by his father; G.K. Chesterton gives no short supply of wonderful and exasperating examples of who this large man (who was no doubt much larger on the inside than he was on the outside) chose to be against every outside influence. In the face of the Manichees, of Plato, of all culture and irrationality and misused tradition; yes, even in the shadow of the great accidental determinist St. Augustine himself, Thomas Aquinas boldly (but always humbly, so humbly as to hardly be matched) proclaims the universality of reason, the love of God, the beauty of the cosmos, and the gorgeous but deadly free will of man. Before much time passes at all we realize that it is no longer Aquinas who stands in the shadow of Augustine, but Augustine and the whole Church who stand in the valley below the feet of the great giant, the feet of the 'Angelic' Doctor who hardly spoke of his angels, who saw something (or Someone) which made all his writings as straw.
We meet a man in these pages who raised the long-dead champion of rationale, Aristotle himself, from the grave, and proceeded to baptize him into the faith. We meet a man who would stop at no boundary in his quest for truth, who would passionately defend against insane and unimaginable errors. We meet a man who contrasts so with all the saints, all the history of the Church herself, that he fills all history with his hugeness. We are introduced, as if at a quiet dinner party (perhaps, we think, the very same party with St. Louis and his French friends), to a man who could touch the stars and the moons with his very mind, and who would treat you as if you were Christ Himself, who would wash your very feet if only you would allow it.
In this book, this small and inconceivable book, G.K. Chesterton reveals all this. And what he has opened is a floodgate, momentarily blockaded by a post-it nailed to a door, but unleashed again with all the fury and calm and strength of the Genesis Flood.