This paperback book is one of the best first books for collectors of fluorescent minerals. The late Thomas S. Warren published it in 1995. This 5 ½” x 8 ½” paperback book has 209 pages, 31 color photos, and several B&W figures. The book is divided into four chapters: The Magic of UV, by Tom; The Fascination of Fluorescent Minerals, by Sterling; The Fluorescent Mineral Hobby, by Dick; and the Activators in Fluorescence Minerals, by Earl. The book is geared to the beginner to intermediate fluorescent collector. However, for the advanced collector it has the best descriptions for the causes of fluorescent in minerals that I have ever read.