diff --git a/Chapter1/Makefile b/Chapter1/Makefile
index 10b36b2..ee6cf96 100644
--- a/Chapter1/Makefile
+++ b/Chapter1/Makefile
@@ -1,4 +1,11 @@
 SOURCES := $(wildcard *.c)
+PROGRAMS := $(subst .c,,$(SOURCES)) 
 
-all: $(SOURCES)
-	@echo $(SOURCES)
+all: $(PROGRAMS)
+	@echo "Building sources: " $(SOURCES)
+	@echo "Built: " $(PROGRAMS)
+
+.PHONY: clean
+
+clean: $(PROGRAMS)
+	rm $(PROGRAMS)
diff --git a/Makefile b/Makefile
index 240bd5d..a735b19 100644
--- a/Makefile
+++ b/Makefile
@@ -8,3 +8,8 @@ subdirs: $(SUBDIRS)
 
 $(SUBDIRS):
 	$(MAKE) -C $@
+
+.PHONY: clean
+
+clean: $(SUBDIRS)
+	$(MAKE) -C $< clean