This volume collects issues 21 to 30 of Atlas (Marvel) Comics' Journey into Mystery from January 1955 to January 1956 (there were no April, June or August 1955 issues).
These issues span the introduction of the Comics Code, with the first two issues in the volume from before the code. There is another fine detailed introduction from Doctor Vassalo covering the introduction of the Code in 1955. The change in content of the stories after the Code is quite noticeable, though to me they are neither better or worse, just different, though with saints making appearances rather then devils. There is a wide range of artists, with several `big names' making appearances. As well as Marvel stalwart Joe Maneely, we have Andru and Esposito, Joe Kubert, Fred Kida, Gene Colan, John Tartaglione, Bob Brown, Dick Ayers, John Severin, Bob Powell, Reed Crandall, and Joe Orlando, just to select a handful.
These are reasonably entertaining stories for the period and genre, and there is some very good artwork here, but this is not for casual browsers; unless you are familiar with the time and place, you will find this disappointing. Those who collect period comics will find it enjoyable, but not a classic.