Grow your Voice to Speak with Confidence
Dr Petro Janse van Vuuren
This book discusses aspects of public speaking that we often neglect, and that is using your voice as an effective tool to get your message across. Instead of telling you how to structure your presentation, how to use the stage or to use body language, she focuses understanding, developing and using the core muscles required to have an effective speaking voice.
It is a little like a Pilates or Yoga course for developing your speaking voice. It is written in 6 chapters, each building on the previous chapter to help you to develop your speaking voice. The accompanying CD takes you through the physical and vocal exercise in the book. While the exercise are good for developing the core muscles (hence my Pilates comment), they are also good for general warm-up (thinking about it they remind me of choir warm-up exercises from high school).
Dr van Vuuren has plenty of experience in the theatre, and many case studies to backup her approach. The book is for sale on her website for R190. You can find out more about her book and workshops on her website.
This is a good book to compliment traditional public speaking training, and I see a place in my bookshelf for it.