Opera Philadelphia is set to present Gregory Spears’ latest work “Sleepers Awake.” Premiering April 22-26 at the Academy of Music, Spears creates a labyrinthine soundscape to accompany a dream-like rendering of the fairytale “Sleeping Beauty,” inspired by modernist Swiss writer Robert Walser. The story follows The Stranger, who wakes Thorn Rose and her companions from a century-long sleep. But instead {…}