The Oxford-River Books English-Thai Dictionary is the first English-Thai dictionary of its kind. Now in its second edition, it offers over 110,000 words and phrases, and 120,000 translations, capturing the idiomatic, colloquial, spoken and written character of English and its equivalents in Thai. Vocabulary is informed by the largest language research programme in the world and includes business, specialist, and computing terminology. Other features include in-text boxes giving examples of words in context, and details on specific topics such as money, and writing letters. There are also appendices on useful phrases, English irregular verbs, the characteristics of the Thai language, and key government organizations. This information is presented in an ultra-clear layout, making the dictionary accessible and easy-to-use. It is aimed at both Thai and English native speakers working and translating from English into Thai, and is ideal for advanced Thai learners who want to develop their Thai language skills.