This book covers star clusters, globular clusters, asterisms and other objects that have been misidentified as such. It is both a descriptive text of the historical study and astrophysics of some the youngest (open clusters) and oldest (globular clusters) objects that populate the Universe along with the most up-to-date catalog of these objects in existence. Over the last few hundred years many of these objects have been repeatedly rediscovered and subsequently renamed, misidentified as to their true nature, or given incorrect celestial coordinates. Altogether there are 5,045 individual objects catalogued in this work that have a total of 13,949 alias names. An extensive Appendix explains the origin of all object names and abbreviations and provides detailed references to the original source material for all object discoveries. In total there are 197 illustrations and 119 pages of extended notes.