The Angels That Came was named so because of so many people who were involved in this project. It is with the aim of popularising Science and a dedication to the people who spent most of their lives in conserving nature and its species. Thus it’s a mixture of romance with particular interest on the subject of orangutan where the ecology of the animal is being discussed stipulated with the knowledge of physics. It is with hope that the motive of this book is to promote the concept of evolution and findings on biomass. The book is an incredible mix of Indian mythology and touches a deep aspect of culture life in North Borneo where orangutans are found. Not many people know of its conservation status in this interior part of the world. Therefore, this book also enlightens the reader by telling a bit of history, culture and socio-economic status as pragmatic as possible. The orangutan is recognised as a protected species and is prioritised as an emblem for tourism and nature conservation. Hopefully, this book succeeds in educating society on its existence and act as an introduction to this beautiful world of ape and people co-existing together.