Why don’t you have [insert codebook] available yet?
We can’t offer newer code books due to copyright reasons, as books only enter the public domain 95 years after publication. However, if we don’t have a book that’s in public domain, go here and vote for which one you want! We’re working on restoring publicly available scans of books all the time, but your vote helps us to prioritize what to work on.
We’re also limited by the books we have access to. If you possess a rare book or document that you’d like to submit for scanning, please contact us at contact@thesparkive.org