diff --git a/Lists_of_OSINT_Web_Resources/Financial-Intelligence-FININT.md b/Lists_of_OSINT_Web_Resources/Financial-Intelligence-FININT.md
index 5a07967..57bb143 100644
--- a/Lists_of_OSINT_Web_Resources/Financial-Intelligence-FININT.md
+++ b/Lists_of_OSINT_Web_Resources/Financial-Intelligence-FININT.md
@@ -65,6 +65,8 @@
   Locate transactions between two Bitcoin addresses.
 - [IntelX Bitcoin Search](https://intelx.io/tools?tab=bitcoin)  
   A great search engine for the Bitcoin blockchain offered by IntelX.
+- [[PDF] Bitcoin: A Peer-to-Peer Electronic Cash System](https://bitcoin.org/bitcoin.pdf)  
+  The original Bitcoin technical whitepaper written and released by the mysterious Satoshi Nakamoto on 31/10/2008. Archived copies available [here (Wayback)](https://web.archive.org/web/20220920015616/https://bitcoin.org/bitcoin.pdf) and [here (Library Genesis)](https://libgen.rs/book/index.php?md5=D56D71ECADF2137BE09D8B1D35C6C042).
 
 ### **<u>Ethereum [ETH] Specific</u>**