Book hands were used for formal copies of literature such as Plato, Thucydides, Homer and the Old and New Testaments. Fast hands - cursive, far more difficult to read. Fast hands were mainly used for correspondence and business documents. Extremely rare use of ligatures. Square breathing marks.
Uncial forms seem to be consciously avoided.
Variety of writing styles, often slanting to the right. Letters are often written with a single line rather than two bounding lines, and hanging on that line rather than above it. Breathing marks are sometimes square, sometimes rounded. Uncial forms begin to show up, and ligatures are being used somewhat regularly. Some is neat and regular, others are irregular.