As of the Spring of 1999, Tom Clancy has written nine books in the Jack Ryan series. They were released in the following order (Date indicates year published.):
The books do not read in chronological order. Without Remorse occurs before any of the others, then Patriot Games, then The Hunt for Red October. These changes give a chronological order like this (with an approx date of occurance.):
Without Remorse and Raindbow Six are not truely Jack Ryan books. Ryan appears in the first in a two-page cameo, and never in the second. However, both contain characters from the "Jack Ryan universe", and therefore are often considered Jack Ryan books.
Tom Clancy has been quick to inform readers that "John Patrick Ryan isn't dead yet." (alt.books.tom-clancy, 8/20/1997)