Thai for English Speakers — Book 4: Intermediate is a focused practice book for learners ready to move beyond basic Thai and work with more nuanced vocabulary, formal language, cultural references, and grammar. Through 300 multiple-choice questions, the book covers Thai idioms and proverbs, literature and history, abstract and academic vocabulary, formal writing and discourse markers, politics, economy and society, and nuanced grammar involving particles, register, and style. Each question presents Thai script, a simplified tone-unmarked reading aid, four answer choices, the correct answer, and a concise English explanation. An answer key is included for structured review and self-study.