In the letters, Halbert obsesses over the space right above the salutation ("Dear Friend..."). In an email, this is your subject line and preview text. In a PDF sales letter, this is the first 3 lines. He teaches you how to use that space to bribe the reader to continue.
Contrary to what the search term suggests, The Boron Letters are not a traditional book. They are a series of raw, unpolished letters written by copywriting legend Gary Halbert to his son, Bond Halbert, in the mid-1980s. The Boron Letters -PDF-
At the time, Halbert was incarcerated at the Federal Prison Camp in Boron, California (a low-security facility in the Mojave Desert). With no access to the internet, clients, or modern conveniences, Halbert did what he did best: he wrote. He wrote daily letters to his teenage son, teaching him about copywriting, human psychology, physical fitness, and the art of the sale. In the letters, Halbert obsesses over the space
Later, these letters were compiled, edited, and published as The Boron Letters. Today, they are often circulated as a PDF due to their out-of-print status and the high demand for Gary Halbert’s wisdom. He teaches you how to use that space
While you can buy new print editions on Amazon, the original physical copies are rare. A digital PDF is instant, searchable, and portable.