Add JS book subscription link.

trekhleb · trekhleb · commit 3c00a695876f · 2018-07-21T07:55:31.000+03:00
diff --git a/README.md b/README.md
@@ -14,7 +14,9 @@ _Read this in other languages:_
 [简体中文](README.zh-CN.md),
 [繁體中文](README.zh-TW.md)
 
-> [→ Be notified when the JavaScript Algorithms book launches](https://upscri.be/402324/)
+> We’re writing a book that will clearly explain, in detail, the main algorithms. 
+If you’d like to be notified when the “JavaScript Algorithms” book 
+launches, [click here](https://upscri.be/402324/).
 
 ## Data Structures
 
