I have been happily going through this book but when i reached p 181, I have com across a problem when I try to run the project. When i then debug it comes up with source not found.
This happens at the following point:

String quakeFeed = getString(R.string.quake_feed);

I have also tried hard coding the value but i get a similar issue with the following line:

url = new URL(quakeFeed);

I am at a complete loss as I have checked & rechecked the strings.xml file and the values check with what is in the book.
Any help would be appreciated

look in your strings.xml file. It should be whatever you named the http URL to the USGS site.