The British singer-songwriter writes about skiffle, a music movement inspired by American roots music, in his new book 'Roots, Radicals and Rockers.' He brings his guitar to the studio to play skiffle and some of his own songs. Also, James Forman Jr., son of civil rights activists, says that African-American leaders seeking to combat drugs and crime often supported policies that disproportionately targeted the black community. His book is 'Locking Up Our Own.'