Linear Light from the Ivory Tower is a posthumous poetry anthology of Sheryl Williams Mathis. Sheryl, an African-American Wiccan in Georgia, was a lover of all things metaphysical and natural. She often expressed her deepest feelings through her poetry. After her death in 2001, her daughter, DaKarai Noshell Yuko, made it her mission to collect and compile her poems into two books, in honor of her mother's loving memory. Linear Light from the Ivory Tower is the first book. WHAT ARE YELLOW AND BLACK BUTTERFLIES, was a piece for FATE MAGAZINE MARCH 2002, written by D. K.N. Yuko