Mandolin wunderkind Sierra Hull at work on third album

[caption id="attachment_61380" align="aligncenter" width="610"] A photo that Mandolin virtuoso, Sierra Hull put on her Facebook page to show her work in the studio on her third album.[/caption] Though Sierra Hull's essay-writing days are behind her—she just graduated from the renowned Berklee College of Music last May—her songwriting ones aren't.