The Diction Books
Quints has published six (6) Diction Textbooks; Phonics and Mastering English Pronunciation Series for learners in Elementary School and can as well be used in Secondary School. They are however specialised books that can only be used by tutors who are proficient in Phonics and Phonetics.
The Diction Book for Adult comes with a CD and a PDF Book. It briefly teaches elocution while examining over 200 commonly mispronounced English words.