If you are a direct response marketer or copywriter, then you're probably familiar with the name Gary Halbert, one of the best known copywriters in the business. You may have even had an opportunity to read his famous series of letters written to his son, Bond, while he served time in prison for mail fraud. The collection of letters, known as The Boron Letters, may be one of the best courses on copywriting in existence.
You can read the entire series, published on thegaryhalbertletter.com. Because the chapters are not interlinked to each other on the site, I've linked each chapter here for your convenience: