Tasks could include shelving books, helping children find books, checking out books, being a responsible adult in the room, doing inventory, displays, processing books (covers, labels, etc.). If you can only commit for the fall, that's fine. She will do a second look at the schedule in December to drop people who can't commit through the winter and add people who are newly available. Volunteers will have to be CORI'd. If you sign up, you'll get information about that.
If you are interested, please sign up here and she will be in touch soon with details. You can also email her at firstname.lastname@example.org.