James Patterson Has Sold More Than 425 Million Books. Here’s the Lesson From His Grandmother That Keeps Him Productive. Posted byDan Bova June 13, 2022 Leave a comment on James Patterson Has Sold More Than 425 Million Books. Here’s the Lesson From His Grandmother That Keeps Him Productive. In his new memoir, the best-selling author shares the funny, thrilling and heartbreaking moments that continue to inspire his singular career.