Slip into spring at the Friends of San Leandro Library Spring Book Sale, Saturday and Sunday, March 26 and 27, in the Estadillo Room at the San Leandro Main Library, 300 Estudillo Avenue, San Leandro. Saturday sale hours, between 9 and 11 a.m., are held for Members of the Friends. Then, from 11 a.m. to 3 p.m., the sale is open to the public.  Sunday’s “All-day $2 a Bag Sale”, is open to everyone from Noon to 3 p.m. Thousands of beautiful books, novels, history, mysteries, westerns, romance, science , collectible volumes and more will be featured. All proceeds benefit the San Leandro Library.