diff --git a/nontech/genetics/docs/books.txt b/nontech/genetics/docs/books.txt
new file mode 100644
index 000000000..d8489e115
--- /dev/null
+++ b/nontech/genetics/docs/books.txt
@@ -0,0 +1,3 @@
+2024
+Brownlee - Genetic Algorithm Afternoon
+    https://libgen.gs/edition.php?id=148153121
diff --git a/pl/java/features/crypto/books.txt b/pl/java/features/crypto/books.txt
new file mode 100644
index 000000000..76482ab32
--- /dev/null
+++ b/pl/java/features/crypto/books.txt
@@ -0,0 +1,6 @@
+2024
+NitaMihailescu - Cryptography and Cryptanalysis in Java
+    https://libgen.gs/edition.php?id=148653851
+    https://libgen.gs/edition.php?id=148649831
+    https://libgen.gs/edition.php?id=148651363
+    https://libgen.gs/edition.php?id=148650205