Heidi leads you on a guided tour through a subterranean world peopled by creative artists and sidewalk visionaries. Down winding tunnels and across gritty subway platforms, through her writing, both gritty and raw, she introduces you to an unforgettable cast of characters, not the least of whom is Heidi herself; a Renaissance woman, free spirit, and fearless adventurer in a world that millions pass through, but few know well. She takes you underground, where the music is the heartbeat of New York City. The chapters are informal, intimate diary entries, reading like a movie, jotted down at midnight after long sessions underground, so the book is a vivid and captivating read, like a breathless ride on the uptown express.