The Mark Twain Library Book fair is being held this weekend at the Redding Community Center. The library, founded by its namesake in 1908, is hosting its  principal fundraiser Labor Day weekend.  More than 65,000 donated books will be available Friday through Monday.  Hours Friday are 9am to 6pm, Saturday and Sunday from 10am to 4pm, and on Monday from 9am to 4pm.  When the author moved to Redding, he had more books than could fit in his new home.  Over 1,000 titles were donated to fill the library’s shelves and his daughter donated more books upon his passing.