These books are available at Amazon.
- Dr. Byrnes TOEFL Speaking: Book II, Integrated Speaking
- Dr. Byrnes TOEFL Speaking: Book I, Independent Speaking
- Dr. Byrnes' TOEFL Reading: Information, Inference, Negative Information and Summary Questions
- Dr. Byrnes' TOEFL Writing: Academic Discussion
- Analytical Writing for College Students and GRE/GMAT Test Takers
- Skills for Critical Thinking: logical reasoning, fallacy detection and scientific reasoning
- Style for clear Writing
These books are available at Amazon and Audible
You might want to check out my pronunciation and prosody website for bargain price audio books and ebooks.