This volume of Golden Age Marvel Comics collects issues 17-20, cover dated March-June 1941, and each issue contains stories featuring both Marvel's major characters (Human Torch, Sub-Mariner, The Angel) and their minor colleagues (The Vision, Ka-Zar, Electro, Terry Vance). The only major player missing is Captain America, who came late to the party, but stars in his own comic - issue #3 is advertised in one of the issues included here, and has his own Archive series. To modern readers, the Angel is forgotten, but Ka-Zar and a slightly different Vision are major names. These issues feature some excellent artwork, with Carl Burgos on the Torch and Bill Everett on the Sub-Mariner, and the first issue reprinted is a 25-page team-up of the two characters. The Angel and Ka-Zar feature in continued stories, a Marvel speciality even in 1941 (and Stan Lee was editing even then). The Angel features very good art by Paul Gustavson, but although one of Marvel's (called Timely back then) major characters, the stories don't quite seem up to the standard of the Torch and Sub-Mariner. Electro is drawn by Steve Dahlman, and to my eyes looks as if Robert Crumb was drawing it.
Anyway, this series is an excellent introduction to Marvel's Golden Age heroes.