Insects: A Very Short Introduction explores the insects’ evolution, behaviour, and development, highlighting their pivotal role in supporting ecosystems across the planet. It considers the threats of pesticides and climate change on the insect population, and the potentially catastrophic impact of their decline. The VSI describes insects as a fascinatingly diverse and beautiful group of animals. They are found on all continents, in caves, underground, inside other insects, in rivers, lakes, and puddles, and in our houses. To date, over a million insect species have been named. It also mentions that insects include predators, parasites, herbivores, detritivores, fungivores, and saproxylics that live on decaying wood.