The following books are available through the
Toastmaster’s website:

Effective Communication by Chris Roebuck

How to Write and Give a Speech by Joan Detz

Powerful Presentations by Dawn Frail

Speaking Secrets for the Bored Room:  How to Fire Up Any Business Audience and Turbocharge Your Career by Reginal Smith

The Seven Strategies of Master Presenters

The Toastmasters International Guide to Successful Speaking by Michael Aun and Jeff Slutsky

Words That Shook the World by Richard Greene