I reach Glaser, 40, at home in St. Louis, just before she leaves for a marathon three-night, six-show run at Boston’s Boch Center Wang Theatre on her “Alive and Unwell” tour, Feb. 21-23.

The six-show run begins September 8 in Nashville and is mapped out through a September 20 performance in Uncasville, Connecticut. The British blues-rock legend’s trek also features concerts in ...