diff --git a/_src/reading/book-backlog.md b/_src/reading/book-backlog.md
index baa6780..396e74b 100644
--- a/_src/reading/book-backlog.md
+++ b/_src/reading/book-backlog.md
@@ -39,7 +39,7 @@ This page shall be updated when I purchase new books or when I finish one on the
 - The History of Middle Earth – Volume 12: The Peoples of Middle-Earth (ISBN: **978-0-261-10348-1**)
 
 ## Derek Landy
-- Skulduggery Pleasant 16 – A Mind Full Of Murder
+- Skulduggery Pleasant 16 – A Mind Full Of Murder (ISBN: **978-0-00-858582-2**)
 - Skulduggery Pleasant – The Haunted House on Hollow Hill: Signed Exclusive Edition (ISBN: **9780008725150**)
 
 ## Katharina Zweig