The Collection of Master Business Letters
The pattern
This still is filed under Direct-from-the-founder letter.
Define
A letter in one person's voice, written as if to one reader, signed by the person who owns the outcome.
Mechanism
Personal authority. The signature is the proof. The tone is the brand. A committee cannot write this and keep the mechanism.
Verdict
Trust sits on a person
Why it works
Presenting the specimens as typewriter facsimiles rather than typeset copy makes them read as real mail, so the reader judges them as letters he could send instead of as prose. The blanked-out names and dashed product lines are an explicit invitation to substitute, which is why the book functions as a paragraph bank instead of an anthology. Indexing by trade rather than by technique means a fertiliser dealer finds the nearest analogue in seconds and lifts the frame whole. Within each letter the engine is a compressed problem-solution turn, usually opened by an anecdote or a taunt and closed by a single specific action, with the capitals doing the work bold type would do later.
Steal this when
Use this structure when you are building an internal swipe bank for a team that writes for many unglamorous verticals and needs a nearest-neighbour template, not a style guide. The indexing decision is the thing to copy: file by the buyer's trade and job, not by campaign or by channel.