You can contact Rhian on rhian AT rhiancahill DOT com
If you wish to contact Rhian the old fashioned way her snail-mail address is -
PO BOX 6118
Don’t forget there are the usual ways to connect with Rhian online in the right hand sidebar. Scroll to the bottom for the link to Authorgraph where you can request Rhian’s signature for your digital books.
Or you can leave her a message here: