The Book entitled “DC Electrical Properties of Mg Substituted NiCuZn ferrites ” mainly deals with the investigations carried out on electrical properties such as viz., electrical conductivity. Microstructural studies with the help of scanning electron microscopy (SEM) revealed uniform grain structure. The dc electrical conductivity (?dc) reveals that the ferrite samples have conductivities varying from 10-6 to 10-9 ohm-1cm-1. This shows that they are fairly resistive. The temperature variation of dc conductivity shows that there are three temperature regions having different types of conduction.