The book entitled "Ni-Cu-Zn Ferrite: Dependence of Structural and Magnetic Properties on Sintering Temperature and Bismuth-Oxide additive" includes a deep level study concerning structural and magnetic properties of Ni-Cu-Zn ferrites. Here, we allow the variation of two parameters termed sintering temperature and wt. percent of Bismuth-Oxide additive and study the corresponding variation on structural and magnetic properties. The researches represented in this book are conducted in the Materials Science Division, Atomic Energy Center Dhaka, Bangladesh which is a well organized laboratory in Bangladesh. It has sufficient and well quality instruments which were used to conduct this research that included in this book. All the experiments are done by the author himself with the direct supervision of his supervisor and co-supervisor. A sincere care has been taken to ensure the accuracy of the experimental results. Sometimes repetition has also been done to get the actual response. While giving references an extra care has been taken. While writing this book, all possible measures has been taken to ensure its quality and usefulness. Wish that it will be helpful to readers.