Polearms, at least within the context of single fighters split from their (now undead) ranks, were normally supplimental. There was never really any singular “just polearms” fighting.
That being said, I suggest Flos Duellatorum. Also known as Fior Di Battaglia, “The Flower of Battle”, an Italian book of martial arts devised by Fiore dei Liberi, which, while not specialising in spears and polearms, included sections on it.
Though, I just think the name sounds nice, tbh.