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@@ -265,7 +265,8 @@ These apps run on a custom built **blockchain, an enormously powerful shared glo
 
 ### Books
 
--   [区块链技术指南](https://yeasy.gitbooks.io/blockchain_guide/content/) by Baohua Yang, 2017
+-   [**Blockchain guide**](https://yeasy.gitbooks.io/blockchain_guide/content/) by Baohua Yang, 2017 --
+    Introduce blockchain related technologies, from theory to practice with bitcoin, ethereum and hyperledger.
     <!-- -   [区块链原理、设计与应用](https://github.com/yjjnls/books/blob/master/block%20chain/%E5%8C%BA%E5%9D%97%E9%93%BE%E5%8E%9F%E7%90%86%E3%80%81%E8%AE%BE%E8%AE%A1%E4%B8%8E%E5%BA%94%E7%94%A8.pdf) -->
 -   [**Blockchain: from Digital Currency to Credit Society**](https://github.com/yjjnls/books/blob/master/block%20chain/%E5%8C%BA%E5%9D%97%E9%93%BE%20%E4%BB%8E%E6%95%B0%E5%AD%97%E8%B4%A7%E5%B8%81%E5%88%B0%E4%BF%A1%E7%94%A8%E7%A4%BE%E4%BC%9A.pdf)
 -   [**Attack of the 50 Foot Blockchain: Bitcoin, Blockchain, Ethereum & Smart Contracts**](https://davidgerard.co.uk/blockchain/table-of-contents/) by David Gerard, London, 2017 --