The Codex File is available to download from this site in multiple formats, both in e-book and audiobook format. Look for the version below that suits you.

 

If you'd rather first be introduced to The Codex File, feel free to download some individual chapters to either read or listen to.
I'm sure once you've made a start you'll want to come back and buy the whole book, but buying by chapter gives you the flexibility to
try out one of my books at a fraction of the price.

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Chapters to download are available for: Kindle | EPub (for multiple e-readers, e.g. Nook, Kobo and Sony Reader) | PDF | MP3 audio