Unless you already know how to read electrical schematics, forget this book and find books that would teach you the very basics. This book had confused me more than help me decipher electrical schematics. I learned to read schematics by working on automobiles and comparing with the schematic in the service manuals.Electricity & electronics are not for everyone, but with proper books and proper instructor (this one is vital) you can at least learn enough to apply it to perform your job right the first time.