This second edition of Thai: An Essential Grammar, authored by David Smyth, offers an up-to-date and concise reference guide to Thai grammar. Using clear, jargon-free explanations, the book sets out the complexities of Thai in short, readable sections, presenting an accessible description of the language focused on its real patterns of use today. No prior knowledge is assumed from readers. The book covers crucial topics such as sentence particles, negation, questions, and quantification, providing examples given in both Thai script and romanized transliteration for ease of understanding. A pronunciation section, guidance on speech conventions and the Thai writing system, a glossary of grammatical terms, and two appendices covering Romanization systems and three key verbs are included to enhance learning. The book is designed to be a valuable resource for those looking to understand and use Thai grammar effectively.