diff --git a/README.md b/README.md
index dd93fd3..b743900 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,21 @@ This chapter covers hacking the floating-point data type as it relates to embedd
 
 -> Click [HERE](https://github.com/mytechnotalent/Embedded-Hacking/blob/main/Embedded-Hacking.pdf) to read the FREE pdf book.
 
+## Chapter 17: Double Floating-Point Data Type
+This chapter covers the double floating-point data type as it relates to embedded development on the Pico W.
+
+-> Click [HERE](https://github.com/mytechnotalent/Embedded-Hacking/blob/main/Embedded-Hacking.pdf) to read the FREE pdf book.
+
+## Chapter 18: Debugging Double Floating-Point Data Type
+This chapter covers debugging the double floating-point data type as it relates to embedded development on the Pico W.
+
+-> Click [HERE](https://github.com/mytechnotalent/Embedded-Hacking/blob/main/Embedded-Hacking.pdf) to read the FREE pdf book.
+
+## Chapter 19: Hacking Double Floating-Point Data Type
+This chapter covers hacking the double floating-point data type as it relates to embedded development on the Pico W.
+
+-> Click [HERE](https://github.com/mytechnotalent/Embedded-Hacking/blob/main/Embedded-Hacking.pdf) to read the FREE pdf book.
+
 ## IN DEVELOPMENT
 
 ## License