Leonardo's Notebooks: Writing and Art of the Great Master by H. Anna Suh (Editor); 2005. Softcover.

This is a regular sized book - full of images and his notes.

From the Introduction: "Comprising some four thousand pieces of paper, what are loosely called Leonardo's notebooks are actually several different collections and compilations of his manuscripts. Ranging from subjects as diverse as anatomical studies to the details of grinding and mixing pigments, they offer nearly unfettered access to the great master's fertile imagination."