diff --git a/exercises/ex09/ex09b.py b/exercises/ex09/ex09b.py
new file mode 100644
index 0000000..5e3a5a6
--- /dev/null
+++ b/exercises/ex09/ex09b.py
@@ -0,0 +1,21 @@
+"""
+Project: Mad Libs
+Page 230
+"""
+
+import re
+import sys
+from pathlib import Path
+
+keywords = ["ADJECTIVE", "NOUN", "ADVERB", "VERB"]
+infile = Path(sys.argv[1])
+outfile = infile.parent / f"{infile.stem}.res{infile.suffix}"
+text = infile.read_text()
+matches = re.finditer(r'(' + r'|'.join(keywords) + r')', text)
+
+for match in matches:
+    name = match.group()
+    res = input(f"Enter {name.lower()}:\n")
+    text = text.replace(name, res, 1)
+print(text)
+outfile.write_text(text)
diff --git a/exercises/ex09/ex09c.py b/exercises/ex09/ex09c.py
new file mode 100644
index 0000000..7609d22
--- /dev/null
+++ b/exercises/ex09/ex09c.py
@@ -0,0 +1,25 @@
+"""
+Project: Regex Search
+Page 230
+"""
+
+import re
+import sys
+from pathlib import Path
+
+directory = Path(sys.argv[1])
+keys = "|".join(sys.argv[2:])
+regex = re.compile(f"({keys})")
+result = []
+
+for path in directory.glob("**/*.txt"):
+    text = open(path, "r").readlines()
+    show_header = True
+    for i, line in enumerate(text):
+        if re.match(regex, line):
+            if show_header:
+                result.append(f"\n{path}")
+                show_header = False
+            result.append(f"{i + 1}\t{line.strip()}")
+
+print("\n".join(result).strip())
diff --git a/exercises/ex09/madlibs.res.txt b/exercises/ex09/madlibs.res.txt
new file mode 100644
index 0000000..7eabc10
--- /dev/null
+++ b/exercises/ex09/madlibs.res.txt
@@ -0,0 +1,2 @@
+The red panda walked to the duck and then sleep. A nearby sheep was
+unaffected by these events.
diff --git a/exercises/ex09/madlibs.txt b/exercises/ex09/madlibs.txt
new file mode 100644
index 0000000..e931d8e
--- /dev/null
+++ b/exercises/ex09/madlibs.txt
@@ -0,0 +1,2 @@
+The ADJECTIVE panda walked to the NOUN and then VERB. A nearby NOUN was
+unaffected by these events.
diff --git a/exercises/ex09/sample1.txt b/exercises/ex09/sample1.txt
new file mode 100644
index 0000000..8581ce7
--- /dev/null
+++ b/exercises/ex09/sample1.txt
@@ -0,0 +1,3 @@
+Write a program that opens all .txt files in a folder and searches for any
+line that matches a user-supplied regular expression. The results should
+be printed to the screen.
diff --git a/exercises/ex09/sample2.txt b/exercises/ex09/sample2.txt
new file mode 100644
index 0000000..5031f0c
--- /dev/null
+++ b/exercises/ex09/sample2.txt
@@ -0,0 +1,11 @@
+1. What is a relative path relative to?
+2. What does an absolute path start with?
+3. What does Path('C:/Users') / 'Al' evaluate to on Windows?
+4. What does 'C:/Users' / 'Al' evaluate to on Windows?
+5. What do the os.getcwd() and os.chdir() functions do?
+6. What are the . and .. folders?
+7. In C:\bacon\eggs\spam.txt, which part is the dir name, and which part is the base name?
+8. What are the three “mode” arguments that can be passed to the open() function?
+9. What happens if an existing file is opened in write mode?
+10. What is the difference between the read() and readlines() methods?
+11. What data structure does a shelf value resemble?