diff --git a/README.md b/README.md
index 01c6462..7bd5f55 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,8 @@
   - <sub>ISBN · 978-0201362985.</sub> 
 - [Design Patterns](https://www.amazon.com/gp/product/0201633612/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=zeroequalsfal-20&creative=9325&linkCode=as2&creativeASIN=0201633612&linkId=519bb92fb310a02f5ce39216f1b52531)
   - <sub>ISBN-10: 0201633612</sub> 
-
+- [API Design Patterns](https://www.manning.com/books/api-design-patterns)
+  - <sub>ISBN-13: 9781617295850</sub> 
 
 <div id='id-section4'/>
 <h2>Human–computer interaction</h2>