Not content with writing a best-selling autobiography, Rolling Stones guitarist Keith Richards now is coming out with his first children's book in September, publishing house Little, Brown said Tuesday. "Gus and Me: The Story of My Granddad and My First Guitar" harks back to the rocker's childhood when his grandfather, Theodore Augustus "Gus" Dupree, a big-band musician, introduced him to the instrument that would define his life. "I have just become a grandfather for the fifth time, so I know what I’m talking about," said Richards in a press release from Little, Brown that he posted on his website. "The bond, the special bond, between kids and grandparents is unique and should be treasured. This is a story of one of those magical moments. May I be as great a grandfather as Gus was to me." Richards, 70, widely regarded as one of rock 'n' roll's finest guitarists, made his literary mark when "Life" -- a revealing expose of the Stones' wild side -- was published in 2011 and raced up the bestseller lists. Contributing illustrations for "Gus and Me" is Richards's daughter Theodora Richards, 28, an artist and model who was once arrested in New York for putting graffiti on a convent wall.