Complex sentence: The 10 novels cover the period 1945 to 1973 and centre on a group of upper and upper middle class characters, forming a novel sequence, if a somewhat loosely structured one.
Split into simpler sentences: The 10 novels cover the period 1945 to 1973 and centre on a group of upper and upper middle class characters. They can be considered a novel sequence, if a somewhat loosely structured one.