The threat of a snow storm Saturday has forced Westport Library officials to reschedule the local appearance by writer James McBride, whose novel, “Miracle at St. Anna,” is the book selected for this year’s WestportREADS community reading project.

McBride is now scheduled to deliver the program’s keynote address a week after initially planned — at 6 p.m., Saturday, Jan. 30, at the Westport Country Playhouse. Library officials say all tickets purchased for the original date will be honored.

The presentation is free, but advance registration is required.

McBride, also a musician and screenwriter, is the author of the best-selling memoir, “The Color of Water: A Black Man’s Tribute to His White Mother.” His novel “The Good Lord Bird” — about John Brown, who led an anti-slavery revolt — was the winner of the 2013 National Book Award for Fiction.

“Miracle at St. Anna” is a novel based on a little-known event in Italy during World War II, when a group of black American soldiers were trapped behind enemy lines in Italy.

To register or for more information, visit www.westportlibrary.org or call 203-291-4800.