If you need a clue ask the group to send you a letter to your private reply.
10 minutes good
5 minutes excellent
3 minutes exceptional
120 seconds superior
This one may be challenging, a special for a Saturday. Not for beginners.
Hint: https://astronomy.com/observing/sky-this-week/2022/09/the-sky-this-week-from-september-23-to-30

Most common letter.
Three-letter word.
Fourth word by letter pattern.
Sixth word (doesn't help much).
Letter pattern, plus letters used up, gives 1st letter of words three and nine.
Letter pattern plus known common English phrases, gives words two-three-four.
Grammar gives last letter of eighth word. This reveals fifth word.
Completion of fifth word reveals last word.
Last word gives author.
Random guesses at 3rd letter of first word (from letters not used); or using your head for a moment from knowledge about the author, gives first word.
That fills in the final word at the same time.
Fin.