This free e-book being provided by Desiring God would be a valuable tool for this weekend. I urge my friends and family to ponder abortion and the reality that America has legally killed 50 million babies since the Roe v. Wade decision in 1973. You can get the book here:
http://www.desiringgod.org/resource-library/online-books/exposing-the-dark-work-of-abortion