diff --git a/SUMMARY.md b/SUMMARY.md
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--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -1,3 +1,6 @@
 # Summary
 
+* [Introduction](README.md)
 * [First Chapter](chapter1.md)
+* [Acknowledgements](acknowledgements.md)
+
diff --git a/acknowledgements.md b/acknowledgements.md
new file mode 100644
index 0000000..df6756f
--- /dev/null
+++ b/acknowledgements.md
@@ -0,0 +1,2 @@
+# Acknowledgements
+