Sulat ng Kaluluwa (Writing of the Soul) is the 2nd book by Ancient Philippine Calligraphy (Baybayin) Artist, Kristian Kabuay. The book features over 50 images of artwork and accompanying stories written by people from around the world. The concept was for each person to provide a word or name and write what it means to them. From the word and story, Kristian created the art. Baybayin is a writing system from the Philippines that's no longer in regular use. There are only 3 remaining tribes that still use it.