Added regex example.

README.md

@@ -118,6 +118,7 @@ Given the json
 | <a href="http://jsonpath.herokuapp.com/?path=$..book[?(@.isbn)]" target="_blank">$..book[?(@.isbn)]</a>          | All books with an ISBN number         |
 | <a href="http://jsonpath.herokuapp.com/?path=$.store.book[?(@.price < 10)]" target="_blank">$.store.book[?(@.price < 10)]</a> | All books in store cheaper than 10  |
 | <a href="http://jsonpath.herokuapp.com/?path=$..book[?(@.price <= $['expensive'])]" target="_blank">$..book[?(@.price <= $['expensive'])]</a> | All books in store that are not "expensive"  |
+| <a href="http://jsonpath.herokuapp.com/?path=$.store.book[?(@.author =~ /.*REES/i)]" target="_blank">$.store.book[?(@.author =~ /.*REES/i)]</a> | All books matching regex (ignore case)  |
 | <a href="http://jsonpath.herokuapp.com/?path=$..*" target="_blank">$..*</a>                        | Give me every thing                   |