Lucents general knowledge is a good book but not sufficient for students . It has alot of stuff to read but in a boring manner, not in a priductive way to read easly.
The whole stuff is usefull but not intersting to read.
It doesnt work to envoke interst of one to read it completely.and alao there are many mistakes of answers. It shall be improve to attract the students interest to get it nd read it easly.