At the least, I would suggest reading Books 1 and 2 before you start Blood Rites (Book 6), and *definitely* before you read Changes, as there's a vital piece of context there that'll make the whole thing not make sense otherwise. Butcher reached allllllllllllllll the way back for that one.
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"Oh, silver blade, forged in the depths of the beyond. Heed my summons and purge those who stand in my way. Lay
waste."
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"Oh, silver blade, forged in the depths of the beyond. Heed my summons and purge those who stand in my way. Lay
waste."