Carved in stone: Martin Luther King Jr’s memorial in Washington DC
© JOHN GREIM/LIGHTROCKET VIA GETTY IMAGES
To the Promised Land: Martin Luther King and the Fight for Economic Justice
by Michael K Honey (Norton, £20)
To Shape a New World: Essays on the Political Philosophy of Martin Luther King, Jr
edited by Tommie Shelby and Brandon M Terry (Harvard, £25.95)