diff --git a/README.md b/README.md
index 5dab57d..28d27cc 100644
--- a/README.md
+++ b/README.md
@@ -330,6 +330,7 @@ for `EXPLAIN`, that also provides performance tips (Commercial Software).
 ### Books
 * [PostgreSQL Mistakes and How to Avoid Them](https://www.manning.com/books/postgresql-mistakes-and-how-to-avoid-them)
 * [The Internals of PostgreSQL](https://www.interdb.jp/pg/index.html) - A free e-book by Hironobu Suzuki
+* [PostgreSQL 14 Internals](https://postgrespro.com/community/books/internals) - A free e-book by Egor Rogov
 
 
 ### Documentation