A Ponie's History of the Snow Ponies, and their Role in Equestria Today is a series of pamphlets written by Toffy Marble, a Snow Pony with big ideas, and distributed by her father and brothers in the streets of Manehattan. The ideas and programs it outlines are revolutionary, and censorship is never far from mind as they toil, but it's important work, and somepony has to do it, before the situation of the forgotten tribes gets out of hoof.
A Thestral named Killjoy is conspiring to ensure the situation absolutely does.