Par KITT EARTHA / KITT TOM / KITT TOM / YORKEY BRIAN /. A piano/vocal songbook featuring nearly every song from the Tony award-winning musical by Tom Kitt and Brian Yorkey about a family\'s struggle to hold itself together while confronting the challenges of mental illness. This book contains 26 emotionally-charged songs, including \'Superboy and the Invisible Girl,\' \'I Miss the Mountains,\' and…