If you do even one presentation in your life, you owe it to those you are presenting to read this book. I have immense respect and trust for David Sparks, and this book is fantastic.
As I write this he is already topping the iBooks charts — so you don’t have to just take my word for it.
Just remember that a presentation isn’t just something conference speakers do, most of us have to present information all time, this will make you better. And maybe that lands you a better job. Maybe