Susan Sontag, author of "Illness as Metaphor" and "On Photography," will read from her new book, "I, Etcetera," in Science Center A on November 28, at 8 p.m., about a month later than announced.

Sontag postponed her Halloween appearance because of unexpected scheduling conflicts, Matthew A. Clark '81, secretary of the Harvard Advocate, said yesterday.

Sontag will appear as part of the Fall Reading Series being sponsored by the Advocate. Past speakers include John Hawkes, author of "Blood Oranges" and Vance Bourjaily, author of "Now Playing at Canterbury."

John Ashbery and Bernard Malamud are other expected participants in the program.