The book "Gentleman's Letter Book. A Complete Guide to Correspondence on Any Subject, with Commercial Forms" by Unknown is an indispensable source for anyone who aspires to master the art of written communication. This book contains samples of letters on various topics - from official letters to letters of an entertaining and personal nature. Each topic is accompanied by appropriate commercial forms, which will make the process of creating letters even easier and more convenient. "Gentleman's postcard" not only allows you to translate your thoughts into words, but also helps you do it with dignity, elegance and professionalism. An indispensable book for everyone who appreciates quality in written communication.