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You will find this thread enlightening.
https://forums.halowaypoint.com/yaf_postst157577_IF-you-ve-read-the-Halo-books--proper-order-Q.aspx
I believe they are arranged by “fall of reach” is first and Thursday was is last (in order of release) Lore wise contact harvest is 1st… if your going for lore you can probably figure it by the excellent post.
Be sure to thank DecepticonCobra.
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