Complex sentence: Volume IV covers 1917, in somewhat less depth than 1916,1916 or 1918, but nonetheless, he goes down to platoon level, and while sometimes economical with the truth, rarely makes an error or even an omission.
Split into simpler sentences: Volume IV covers 1917, in somewhat less depth than 1916,1916 or 1918. Nonetheless, he goes down to platoon level, and while sometimes economical with the truth, rarely makes an error or even an omission.