My fellowship mentor, Dr. James Thomas , taught me much of all I know about the voicebox both when it works and when it doesn't leading to hoarseness . Much of his knowledge is imparted in a book he wrote which is now available for purchase on Amazon.com . Although healthcare professionals interested in the voice will find the book very helpful, it is written in such a way that any layperson without a medical background can also find it understandable and helpful. Check it out here !��…