In his new book Ghostnotes: Music of the Unplayed, Irish-born, SoCal-based photographer Brian "B+" Cross brings together over 200 images in a photo essay that traces his journeys through Los Angeles hip-hop, Jamaican dub, Brazilian samba and beyond, looking for the connections music makes between people, cultures and moments in history. Read the full article to learn more about Cross and Ghostnotes. All photos by Brian "B+" Cross.