This magazine, published by Galaxy Publishing Corporation, features science fiction stories written by renowned authors such as Robert A. Heinlein, Larry Niven, and Poul Andeson. It is a first edition magazine from January 1966 to April 1973 and is illustrated, making it a unique addition to any collection.

The publication name is World of If, and it was published monthly in English. This particular issue contains the story "The Moon Is A Harsh Mistress" by Robert A. Heinlein. It was not signed by any of the authors and was manufactured in the United States. This magazine falls under the category of Books & Magazines and specifically Magazines. It is a must-have for any science fiction enthusiast or collector.