The Order
The Hunt for Red October > Red Storm Rising > Patriot Games > The Cardinal of the Kremlin > Clear and Present Danger > The Sum of All Fears > Without Remorse > Debt of Honor > Executive Orders > Rainbow Six > The Bear and the Dragon

Ok. I'm pretty sure all of them are about Jack Ryan, except for Without Remorse and Rainbow Six, which are about John Kelly/Clark. Red Storm Rising and Cardinal of the Kremlin may or may not be Jack Ryan as well, but I've no way to be sure until I get through Hunt for Red October, when I begin my hunt for Red Storm... More on that in about a week and a half, when I finish the book...