When you read a self help book, check what others are saying (same true, of course, about all buying decisions) about your chosen writer/mentor/guru. Refer this thread on Quora for review of Brian Tracy.
Who is Brian Tracy?
Brian Tracy is Chairman and CEO of Brian Tracy International, a company specializing in the training and development of individuals and organizations. Brian’s goal is to help you achieve your personal and business goals faster and easier than you ever imagined. Brian Tracy has consulted for more than 1,000 companies and addressed more than 5,000,000 people in 5,000 talks and seminars throughout the US, Canada and 55 other countries worldwide.