Complex sentence: It exists within the fictional BattleTech Universe, appearing in seven novels within the series as well as having their own game source boo, more than any of the other fictional mercenary regiments within the Battletech universe.
Split into simpler sentences: It exists within the fictional BattleTech Universe, appearing in seven novels within the series as well as having their own game source book. More than any of the other fictional mercenary regiments within the Battletech universe.