Gustav Holst’s Planets suite has become established as one of the classics of twentieth-century orchestral music. Michael Short has prepared a detailed book on the life and work of Holst, having worked closely with Holst’s daughter Imogen until her death in 1984. Short was allowed access to all Holst’s documents including his letters and diaries. The resulting book contains much information which has come to light since the publication of Imogen Holst’s biography of her father fifty years ago. The book includes a biography, an analysis of Holst’s musical style and a substantial reference section. It will be of interest to music students, musicologists, musicians and the general musical reader.