I_Abibde posted...I never did play the L5R CCG, but I still have several of the Rokugan sourcebooks for 3rd Edition D&D.
I have 40 books from all editions 1e to 4e. I actually have the very first 1e rulebook ever released. And I've got every 1e and 2e clanbook from each clan (and the minor clans, and the monks, and the ronin).
I also have Legend of the Burning Sands (which is like L5R, except to the north of Rokugan, in a desert which is basically fantasy Arabia, and with influenced from even farther north into fantasy Egypt), and about 10 7th Sea (which is like L5R set in fantasy swashbuckling Europe) books.
L5R is basically the system I'm most financially invested in other than White Wolf (where I have closer to 250 books).
EDIT: Oh, and for reference, of those 40 books, 7 of them exist more or less solely to sum up events from the CCG tournaments and card set metaplot, and have ways to integrate players into campaigns based on the events of the card game. Which was always the coolest part of that particular system for me.
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"Wall of Text'D!" --- oldskoolplayr76
"POwned again." --- blight family