"LUCENT SAMANYA GYAN" is the best book of preparation of the competitive examination. Lucent samanyagyan book consists in all chapter and topic like History, Geography, Poltical science, Physics, Chemistry, Biology and miscellaneous etc. The author of" Lucent samanyagyan" is very intelligent man. because the all topic of lucent samanyagyan systematically arranged sentence in this book. so, I recommended for every student to buy this book and the preparation will be continue.