The book is divided into seven segments: Insect diversity and conservation, environmental toxicology of insects, insect taxonomy, insect behaviour, medicinal value of insects, Insects as food for human and livestock, and insect pest management. In the first segment there is a general discussion on the biodiversity and conservation of insects with emphasis on India, next will be a chapter on grasshopper diversity, followed by how acridid grasshoppers play an important role in conserving forest ecosystem health. In the second segment it will be discovered how heavy metal pollution is impacting grasshopper population. The third segment will dealing with a wide taxonomical review on the order Diptera that have medical importance. In the fourth segment the foraging behaviour of two ant species has been revealed. In the fifth segment you will gain knowledge about nutraceuticals and medicinal insects that is yet a very less explored field. In the sixth segment we have tried to put some lights on the edible insects of Latin American countries, which will followed by a discussion on a very special group of Mexican edible hemipteran: The Jumiles. The last chapter of this segment will disclose nutrients and anti-nutrients of a potential food insect from India. In the concluding seventh segment ideas of pest control using semiochemicals will be revealed that are most recent eco-friendly way for pest management. This segment will be concluded with a discussion on the management of a very special and devastating group: The Locusts. We are very sure that readers will enjoy this book and the information provided in this book will be utilized by the researchers working on insect science across the globe.