Fix bad link

Author: kjhealy

README.Rmd

@@ -38,7 +38,7 @@ This is an R package of datasets, functions, and course materials to go along wi
 
 ## What's in this Package
 
-The `socviz` package contains about thirty datasets and a number of utility and convenience functions. Most of them are used in _[Data Visualization: A Practical Introduction](https://amzn.to/2vfAixM)_ (`https://socviz.co`), and there are also a few others as well for self-learners and students to practice their skills on. 
+The `socviz` package contains about thirty datasets and a number of utility and convenience functions. Most of them are used in _[Data Visualization: A Practical Introduction](`https://socviz.co`), and there are also a few others as well for self-learners and students to practice their skills on. 
 
 
 ## Installation

README.md

@@ -20,10 +20,10 @@ Introduction](https://press.princeton.edu/books/paperback/9780691181622/data-vis
 ## What’s in this Package
 
 The `socviz` package contains about thirty datasets and a number of
-utility and convenience functions. Most of them are used in *[Data
-Visualization: A Practical Introduction](https://amzn.to/2vfAixM)*
-(`https://socviz.co`), and there are also a few others as well for
-self-learners and students to practice their skills on.
+utility and convenience functions. Most of them are used in \_[Data
+Visualization: A Practical Introduction](%60https://socviz.co%60), and
+there are also a few others as well for self-learners and students to
+practice their skills on.
 
 ## Installation