From the back of the book:
"MechWarriors receive all the glory; aerospace fighter pilots a close second; vehicles are considered the workhorses of any military; infantry are even given their day in the sun in the minds of the common citizen. But no battle could be waged, nor won, without the mammoth apparatus of support vehicles that feed the war machines of the Great Houses. From cargo trucks to tank airships, airborne MASH to communication satellites, armored transport rails to coastal patrol boats, hauler exoskeletons to LoaderMechs, even hover and wheeled police cruisers or civilian vehicles conscripted into the military: the support vehicle is the true backbone of any military machine.
Built using the construction rules found in Combat Equipment, Classic BattleTech Technical Readout: Vehicle Annex provides a never-before-seen look at the support vehicles behind the militaries of every faction, as well as a slice of every day life in the BattleTech universe. From tracked land-trains to police cruisers, Luxury VTOLs to Fix-wing passenger planes, satellites, super-heavy naval surface ships, IndustrialMechs and more: the gamut of the BattleTech universe, fully illustrated for the first time."