diff --git a/Chapter_10/10-11_favorite_number.py b/Chapter_10/10-11_favorite_number.py
new file mode 100644
index 0000000..a81579f
--- /dev/null
+++ b/Chapter_10/10-11_favorite_number.py
@@ -0,0 +1,15 @@
+# Exercise 10-11 Favorite Number
+# Learning Objective: Save data in JSON format. 
+
+import json
+from pathlib import Path
+
+path = Path("./Chapter_10/favorite_number.json")
+
+favorite_number = input("What is your favorite number?")
+
+path.write_text(json.dumps(favorite_number))
+
+
+
+
diff --git a/Chapter_10/10-11b_favorite_number.py b/Chapter_10/10-11b_favorite_number.py
new file mode 100644
index 0000000..f058187
--- /dev/null
+++ b/Chapter_10/10-11b_favorite_number.py
@@ -0,0 +1,12 @@
+# Exercise 10-11b Favorite Number
+# Learning Objective: Load stored JSON formatted data.
+
+import json
+from pathlib import Path
+
+path = Path("./Chapter_10/favorite_number.json")
+
+contents = path.read_text()
+favorite_number = json.loads(contents)
+
+print(f"I know your favorite number. It's {favorite_number}.")
\ No newline at end of file
diff --git a/Chapter_10/favorite_number.json b/Chapter_10/favorite_number.json
new file mode 100644
index 0000000..504af8e
--- /dev/null
+++ b/Chapter_10/favorite_number.json
@@ -0,0 +1 @@
+"21343524"
\ No newline at end of file