You'll not be surprised to see that my top recommendation is my own recently published book -  The presenter's Edge.

It was designed to be easy to read and easy to put into action and that's what the reviewers are saying.

"Gavin has made this subject both interesting and engaging. His ability to give relevant examples and case studies means the reader is able to follow and implement his advice. Plus links and QRCodes to further reading expands the offering further.

I  used the knowledge in the book to review a presentation I had already prepared, by tweaking it using Gavin's tips made it much easier and more natural to deliver. Plus the results from the feedback were brilliant." LJ, Hampshire