diff --git a/BOOK.mkd b/BOOK.mkd
index 9624c5d..028adc3 100644
--- a/BOOK.mkd
+++ b/BOOK.mkd
@@ -1,5 +1,6 @@
 ## 2023
 * Januar: [Simon Stalenhag "Tales from the Loop](https://yourbook.shop/book/?isbn=9783596704835&ref=mezzo&aff=mr)
+* Februar: [Blake Crouch "Upgrade"](https://yourbook.shop/book/?isbn=9781529045369&ref=mezzo&aff=mr)
 
 ## 2022
 * Januar: [Dave Eggers "Every"](https://yourbook.shop/book/?isbn=9783462001129&ref=mezzo&aff=mr)