Check out the new review of my book GROUP SINGING WITH OVERTONES in the International Choral Bulletin: http://icb.ifcm.net/book-review-group-singing-with-overtones-stuart-hinds-2020/?fbclid=IwAR1gLm8IGMlV8UuWNixKZweSScQvzvHwzFm-_dxkG1M3QYTLlP-h9axCqfA