Okay, the user wants me to translate "cook-book" into Thai. Let me check the rules again. The first rule says to translate all content into Thai. The second rule says if it's already in Thai, leave it as is. The third rule is to provide only the translation without explanations.
So, "cook-book" is in English. I need to translate it. The Thai word for cookbook is usually "หนังสือสูตรอาหาร" which literally means "recipe book." I should make sure there's no existing Thai term that's more commonly used. Sometimes "หนังสือประกอบอาหาร" might be used, but "หนังสือสูตรอาหาร" is the standard term. Let me confirm that. Yes, that's correct. So the translation should be "หนังสือสูตรอาหาร." I'll output that without any explanations as per the rules.