If you are perusing for competitive exams then books are root for you, you need to take coaching to clear doubts and practice.
Below are some book names lists which are proven.
Mumal General Knowledge Version
It is latest general knowledge book which cover mostly topics very beautifully. You get history, culture and geographic knowledge.
They publish for mostly states. It covers most, so you must read.
Sumitra Tricky Mathematics
Sumitra Mathematics is well performing course. It gives best examples to teach you. You get best formula’s which increase your accuracy and speed to solve problems and at all, it matters.
It is Hindi subject publication and best in this niche. It clears all aspect of Hindi.