He has 109 books written and published. However, some of the books are his in name only, and were actually authored (ghostwritten) by others. Collectively, these are known as his 'apostrophe' books,...
Without Remorse (in production, due in 2008), The Sum of All Fears (2002), Netforce (based on a story, Made for TV, 1999), OP Center (story, TV, 1995), Clear and Present Danger (1994), Patriot Games...