The H-index has been increasingly used in the ranking of academic institutions, including universities because it has been increasingly considered as an important tool for academic leadership assessment. The collective H-index of the academics in an institution represents the institution H-index. The ranking of academic institutions including universities is actually aiming at determining which institutions are leading in their fields and giving them a reputation credit according to their rank. The main aim of this book is to provide the essential knowledge needed by academics about the H-index and the relevant topics.