Bishop Spong, a longtime voice of progressive Christianity, will appear May 5 at Borders, 1500 16th St., Oak Brook, at 7:30 p.m. Among the ideas he tackles in his newest book are that St. Paul was a closeted gay man and that Jesus and Mary Magdalene were married. Friday, May 6, 7 p.m., he will be at a signing hosted by Seminary Co-op Bookstore, Chicago Theological Seminary, Graham Taylor Chapel, 5757 S University Ave. Contact: Seminary Co-op Bookstore, (773) 752-1571

Affinity and Lambda Legal Outreach Director, Beverly Tillery, will host a forum about marriage equality May 19 at Affinity Community Services, 5650 S. Woodlawn, 7-9 p.m. Call Lambda Legal at (312) 663-4413 or Affinity at (773) 324-0377.