diff --git a/db/sql/postgres/docs/courses/pg-pro.txt b/db/sql/postgres/docs/courses/pg-pro.txt
index 2e6264eef..c2412fdb3 100644
--- a/db/sql/postgres/docs/courses/pg-pro.txt
+++ b/db/sql/postgres/docs/courses/pg-pro.txt
@@ -4,7 +4,9 @@ PostgresProfessional - DBA2 Administration of 18 parts
 PostgresProfessional - RogovLuzanovTolmachyov - QPT13 - Query Optimization of p12
     https://postgrespro.ru/education/courses/QPT
     https://www.youtube.com/playlist?list=PLaFqU3KCWw6JW80WBHPOe-SMJD2NOjmge
-    p3 - Sequential Access of 47:06
+    p4 - Inex Scan 0:00 of 41:10
+        https://www.youtube.com/watch?v=iu35dYTchu4
+    p3 - Sequential Scan of 47:06
         https://www.youtube.com/watch?v=X2DOIf0DfJ0
     p2 - Query Execution of 43:14
         https://www.youtube.com/watch?v=_6ce4YFFScc
diff --git a/libs/libgen/annas.txt b/libs/libgen/annas.txt
new file mode 100644
index 000000000..f1c28fdf2
--- /dev/null
+++ b/libs/libgen/annas.txt
@@ -0,0 +1,3 @@
+https://annas-archive.org/
+
+https://libgen.onl/annas-archive-ebooks/
diff --git a/libs/libgen/zlib.txt b/libs/libgen/zlib.txt
new file mode 100644
index 000000000..c65939a50
--- /dev/null
+++ b/libs/libgen/zlib.txt
@@ -0,0 +1,5 @@
+https://z-library.sk/
+
+https://libgen.onl/z-library/
+https://zlibrary.st/
+https://zlibrary.st/zlibrary-alternatives
diff --git a/pl/java/libfws/micro/ibm-quarkus/docs/books.txt b/pl/java/libfws/micro/ibm-quarkus/docs/books.txt
index a62c650a7..f52d4342c 100644
--- a/pl/java/libfws/micro/ibm-quarkus/docs/books.txt
+++ b/pl/java/libfws/micro/ibm-quarkus/docs/books.txt
@@ -1,3 +1,3 @@
 2025
-Quarcus in Action
+StefankoMariska - Quarcus in Action
     https://developers.redhat.com/e-books/quarkus-action
diff --git a/science/ai/free/claude.txt b/science/ai/free/claude.txt
new file mode 100644
index 000000000..a42372fc4
--- /dev/null
+++ b/science/ai/free/claude.txt
@@ -0,0 +1 @@
+http://claude.ai/