Gerald Knowles 
Patterns of Spoken English [PDF ebook] 
An Introduction to English Phonetics

First published in 1987. Most introductory textbooks in phonetics are designed to turn the people who use them into phoneticians. People who take phonetics courses, on the other hand, do not in general wish to become specialists, but rather need to know what the study of phonetics has to offer in some other field. This book is intended for those involved in any way with the study of the English language: for students of linguistics or literature, teachers of English, and those involved with the study of literacy, or the analysis of dis course or conversation.