There are also titles specifically on stage fright. Find them by searching one of the mega-bookstores online. Be aware that to acquire physical know-how you must look for a different kind of learning experience. You can not learn to tango by reading a book. Public speaking is a physical activity.
Stage fright is an emotional reaction which restricts physical abilities.
To unlearn the unwanted physical reactions associated with stage fright, you must practice performance before an audience. Once it not enough. Mastery requires distributed and incremental learning. For these reasons, I recommend joining Toastmasters. Other options are to engage a professional coach or enroll in a class or seminar.