There were many books that could improve one's ability to speak. One could refer to the following popular types: 1. Language books: These books can help students understand different language structures and grammar rules to improve the accuracy of pronunciation and intonation. For example," Introduction to English grammar "," Quick English Speaking ", and so on. 2. Communication Skills Books: These books can help readers master effective communication skills, including expressing their own opinions, listening to others 'thoughts, avoiding conflicts, etc. For example," How to Communicate effectively "," Non-violent Communication ", etc. 3. Books on speech and eloquence: These books can help readers improve their speech and eloquence skills, including displaying their skills, controlling their emotions, and increasing their self-confidence. For example, The Power of Speech, Eloquence Training, and so on. To improve your speaking ability, you need constant practice and practice. I suggest that readers choose books that suit their needs and interests, and read and practice regularly to really improve their speaking ability.