SINGER WRITES SONGS, BOOK

Jimmy Buffett is mixing his mediums. He has a book of short stories titled "Tales from Margaritaville - Fictional Facts and Factual Fictions" coming out, and six of the songs on his latest album, "Off to See the Lizard" are based on stories from that book. The book, which is dedicated to his parents, is described as two parts autobiography and one part fiction and is his second published work. Last year Buffett and his daughter, Savannah Jane, collaborated on a children's book, "The Jolly Mon," and they have another coming in 1990 . . . Art Garfunkel`s first collection of poetry has been published under the title "Still Water." In addition to his poems about love, travel and memories, the book includes excerpts of an interview with Garfunkel.