Indestructible waterproof material: You will never need another bookmark again – waterproof, tear resistant, will last forever as long as you use it as a bookmark. Unique Design: Each bookmark honors a philosopher with all their guiding wisdom. Size: 7 x 2 inches, not too big for the smallest paperback, not too small for the biggest hardcover. Friedrich Wilhelm Nietzsche was a German philosopher, cultural critic, composer, poet, philologist, and Latin and Greek scholar whose work has exerted a profound influence on modern intellectual history. He began his career as a classical philologist before turning to philosophy.