thanks Brian..but when i try to run script it gives me nullpointer exception.
selenium.grid2.geb.presentation.TestExampleSpecification > Add a book to 'Testin
AILED
java.lang.NullPointerException at TestExampleSpecification.groovy:23
geb.driver.DriverCreationException
Caused by: org.openqa.selenium.remote.UnreachableBrowserException
Caused by: org.apache.http.conn.HttpHostConnectException
Caused by: java.net.ConnectException
geb.driver.DriverCreationException
Caused by: org.openqa.selenium.remote.UnreachableBrowserException
Caused by: org.apache.http.conn.HttpHostConnectException
Caused by: java.net.ConnectException