The Greenwich Village Society for Historic Preservation is sponsoring a free discussion and book signing with Luther S. Harris, author of “Around Washington Square,” Wed., Jan. 28, at 6:30 p.m., at Jefferson Market Library, 425 Sixth Ave., at 10th St. Neighborhood historian and preservationist Harris spent 20 years researching the true story of Washington Sq. A book signing will follow the lecture and slide presentation. Reservations required. Call 212-475-9585 x 39 or e-mail lfitzpatrick@gvshp.org to R.S.V.P.