The Diamond Lens is a fantasy novel created by Fitz James O'Brien. In this work, contemporaries of America of the 19th century are offered an in-depth journey into the world of the smallest details of beauty and perfection. The protagonist finds himself in his own labyrinth of monstrous search and adoring impatience, trying to cut a diamond lens only half a dozen inches in diameter from a stone. Combining science with magic and philosophy, O'Brien creates a fascinating canvas that will put the reader in front of eternal questions about the value of human life, inspiration and the limits of one's own ambition.