Do you know somebody who deals with a group of 20 teenagers or adults who do not read much?
(That is, somebody who is part of a group that does tutoring or mentoring for High Schoolers? A scout leader. A church group. Your old fraternity. A parole officer.)
You can get 20 free books to give to these 20 people. You just have to pick them up.
The publisher sends them to a nearby library or bookstore. The group sends somebody to pick up the stack of books on a particular day. Then they commit to handing them out to 20 people.
Info at http://www.us.worldbooknight.org