This PDF is GPG-signed so you can verify it came from the author and hasn't been tampered with.
curl -O https://gateconquestbooks.pages.dev/pubkey.asc
gpg --import pubkey.asc
Check the fingerprint matches:
curl -O https://gateconquestbooks.pages.dev/ga/gateconquestbooks_ga.pdf
curl -O https://gateconquestbooks.pages.dev/ga/gateconquestbooks_ga.pdf.asc
gpg --verify gateconquestbooks_ga.pdf.asc gateconquestbooks_ga.pdf
Expected output:
gpg: Good signature from "GATE GA Conquest Book <gateconquestbooks.pages.dev>"
gpg: WARNING: This key is not certified with a trusted signature!
There is no indication that the signature belongs to the owner.
The "not certified" warning is normal — it just means you haven't personally signed this key. What matters is "Good signature".
The same fingerprint is printed on the last page of the PDF. If the PDF you're verifying shows a different fingerprint, the key or the PDF has been tampered with.