diff --git a/01_gh_filter/README.md b/01_gh_filter/README.md
index e685e46..d041551 100644
--- a/01_gh_filter/README.md
+++ b/01_gh_filter/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/02_Discrete_Bayes/README.md b/02_Discrete_Bayes/README.md
index e685e46..d041551 100644
--- a/02_Discrete_Bayes/README.md
+++ b/02_Discrete_Bayes/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/03_Least_Squares/README.md b/03_Least_Squares/README.md
index e685e46..d041551 100644
--- a/03_Least_Squares/README.md
+++ b/03_Least_Squares/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/04_Gaussians/README.md b/04_Gaussians/README.md
index e685e46..d041551 100644
--- a/04_Gaussians/README.md
+++ b/04_Gaussians/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/05_Kalman_Filters/README.md b/05_Kalman_Filters/README.md
index e685e46..d041551 100644
--- a/05_Kalman_Filters/README.md
+++ b/05_Kalman_Filters/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/06_Multivariate_Kalman_filter/README.md b/06_Multivariate_Kalman_filter/README.md
index e685e46..d041551 100644
--- a/06_Multivariate_Kalman_filter/README.md
+++ b/06_Multivariate_Kalman_filter/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/07_Kalman_Filter_Math/README.md b/07_Kalman_Filter_Math/README.md
index e685e46..d041551 100644
--- a/07_Kalman_Filter_Math/README.md
+++ b/07_Kalman_Filter_Math/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/08_Designing_Kalman_Filters/README.md b/08_Designing_Kalman_Filters/README.md
index e685e46..d041551 100644
--- a/08_Designing_Kalman_Filters/README.md
+++ b/08_Designing_Kalman_Filters/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/09_Extended_Kalman_Filters/README.md b/09_Extended_Kalman_Filters/README.md
index e685e46..d041551 100644
--- a/09_Extended_Kalman_Filters/README.md
+++ b/09_Extended_Kalman_Filters/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/10_Unscented_Kalman_Filters/README.md b/10_Unscented_Kalman_Filters/README.md
index e685e46..d041551 100644
--- a/10_Unscented_Kalman_Filters/README.md
+++ b/10_Unscented_Kalman_Filters/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/11_Ensemble_Kalman_Filter/README.md b/11_Ensemble_Kalman_Filter/README.md
index e685e46..4fb61f7 100644
--- a/11_Ensemble_Kalman_Filter/README.md
+++ b/11_Ensemble_Kalman_Filter/README.md
@@ -1,2 +1,3 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
+z
\ No newline at end of file
diff --git a/12_Designing_Nonlinear_Kalman_Filters/README.md b/12_Designing_Nonlinear_Kalman_Filters/README.md
index e685e46..d041551 100644
--- a/12_Designing_Nonlinear_Kalman_Filters/README.md
+++ b/12_Designing_Nonlinear_Kalman_Filters/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/13_HInfinity_Filters/README.md b/13_HInfinity_Filters/README.md
index e685e46..d041551 100644
--- a/13_HInfinity_Filters/README.md
+++ b/13_HInfinity_Filters/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/14_Smoothing/README.md b/14_Smoothing/README.md
index e685e46..d041551 100644
--- a/14_Smoothing/README.md
+++ b/14_Smoothing/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/Appendix_A_Installation/README.md b/Appendix_A_Installation/README.md
index e685e46..d041551 100644
--- a/Appendix_A_Installation/README.md
+++ b/Appendix_A_Installation/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)
diff --git a/Appendix_B_Symbols_and_Notations/README.md b/Appendix_B_Symbols_and_Notations/README.md
index e685e46..d041551 100644
--- a/Appendix_B_Symbols_and_Notations/README.md
+++ b/Appendix_B_Symbols_and_Notations/README.md
@@ -1,2 +1,2 @@
-You may access this book via nbviewer at any time by using this address:
+You may read this book online via nbviewer by using this link:
 [*Read Online Now*](http://nbviewer.ipython.org/github/rlabbe/Kalman-and-Bayesian-Filters-in-Python/blob/master/table_of_contents.ipynb)