Great book. I personally love this book, it teaches me to learn the diverse technique of speaking with confidence; I believe the skills are important in all sphere of life. It a thick book with 502 pages and 31 chapters, and every chapter have exercise in it, so you can practice along the way with author guideline.

Quick notes;
-Be genuine interested in the audience
-Converse to the audience; a talk given in natural and conversation manner
-Know when to pause
-Be passionate about the topic that you talk about
-Use visualization technique and figurative word
-Be confident

I highly recommend this book if you seek to develop or improve your public speaking skill. Enjoy reading!