The Andamanese language is one of the oldest languages of the world and it is our national heritage. It is very unfortunate that there are not more than four members in the community who can speak some words and phrases in this  language. The present form of this language which is commonly known as Jeru, is a mixed variety of some of the languages of the Andaman Islands that were spoken in the past but are extinct now. During the work of the project Vanishing Voices of the Great Andamanese (2005-2009), we had a chance to meet many Andamanese children and felt that they should get an opportunity to learn their ancestral language. This was also the time when we met ten members who knew their heritage language. This is a small and modest attempt to familiarize the Andamanese children with the letters of their language. Since most of them are already learning Hindi in school, we decided to use the Devanagri script in this book. Each Andamanese word is also given in Roman script to make it accessible to a larger audience. We hope that the children will love this first Book of Letters. Nao Jr, the only member of the community who knew his language well helped us to prepare this Book of Letters.