Robert Landau discusses and signs ‘Rock ‘n’ Roll Billboards of the Sunset Strip’ Saturday, Mar. 22 at 3 p.m. at Samuel French Bookshop, 7623 Sunset Boulevard., Hollywood. In ‘Rock ‘n’ Roll Billboards of the Sunset Strip’ author/photographer Robert Landau showcases these signs when rock was the most important music ever recorded, when youth, politics, and art merged into mainstream culture.