diff --git a/backend/libraries/dsa/library.json b/backend/libraries/dsa/library.json
index 008cc9a..dad9cff 100644
--- a/backend/libraries/dsa/library.json
+++ b/backend/libraries/dsa/library.json
@@ -12,11 +12,20 @@
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diff --git a/backend/libraries/dsa/stage/ee60f8138669faf3b708b07b711caa0085c302331c94ce3f62816009e4cb3275--Daniel_Kahneman_-_Schnelles_Denken_langsames_Denken_2012_Siedler_Verlag_-_libgen.li.pdf b/backend/libraries/dsa/stage/ee60f8138669faf3b708b07b711caa0085c302331c94ce3f62816009e4cb3275--Daniel_Kahneman_-_Schnelles_Denken_langsames_Denken_2012_Siedler_Verlag_-_libgen.li.pdf
new file mode 120000
index 0000000..6d18252
--- /dev/null
+++ b/backend/libraries/dsa/stage/ee60f8138669faf3b708b07b711caa0085c302331c94ce3f62816009e4cb3275--Daniel_Kahneman_-_Schnelles_Denken_langsames_Denken_2012_Siedler_Verlag_-_libgen.li.pdf
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\ No newline at end of file