With future perfect (F2) you jump to a point in the future, turn round and say some action is finished then. Actually a complicated thing and cumbersome and in most cases you can express the same idea much simpler without using F2. This tense existed in Latin and it was imitated by writers.
In current English usage, muse can refer in general to a person who inspires an artist, writer, or musician.
Muse is many things: a satire of New Yorkâs social world, a portrait of publishing that is both love song and takedown, and an intriguing mystery. But beneath the bookâs sometimes brittle surface lies the belief that literature can change lives. Yes, the business of books is changing.