Here are some of my favourite presentation books:

Presentation Zen: Simple Ideas on Presentation Design and Delivery Garr Reynolds

slide:ology: The Art and Science of Creating Great Presentations Nancy Duarte

Give Your Speech, Change the World: How to Move Your Audience to Action Nick Morgan

The How of WOW: A Guide to Giving a Speech That Will Positively Blow ‘Em Away Tony Carlson

Rainmaking Presentations: How to Grow Your Business by Leveraging Your Expertise Joseph Sommerville