diff --git a/books/free-programming-books.md b/books/free-programming-books.md
index b6b3ebfa0fddef6cbbae61b59e7df77ab9baa032..c281ddceb2b5c85b2ad5d826a65e6a2c8bc4a799 100644
--- a/books/free-programming-books.md
+++ b/books/free-programming-books.md
@@ -1961,8 +1961,8 @@ Kerridge (PDF) (email address *requested*, not required)
 * [Learning React.js: Getting Started and Concepts](https://scotch.io/tutorials/learning-react-getting-started-and-concepts)
 * [React-Bits](https://github.com/vasanthk/react-bits)
 * [React Book, your beginner guide to React](https://github.com/softchris/react-book/) - Chris Noring
-* [React Enlightenment](https://www.gitbook.com/book/frontendmasters/react-enlightenment/details)
-* [React In-depth: An exploration of UI development](https://www.gitbook.com/book/developmentarc/react-indepth/details)
+* [React Enlightenment](https://www.reactenlightenment.com)
+* [React In-depth: An exploration of UI development](https://developmentarc.gitbooks.io/react-indepth/content/)
 * [React JS Notes for Professionals](https://goalkicker.com/ReactJSBook/) - Compiled from StackOverflow Documentation (PDF)
 * [React Primer Draft](https://github.com/mikechau/react-primer-draft)
 * [React Succinctly](https://www.syncfusion.com/ebooks/react-succinctly) - Samer Buna