Clearly, this book was published before food photography was a thing. If I didn’t know better, I would think that was a pile of dirt decorating those plates with some lovely garnish.
Hamburger meat is a staple of the time as it is usually quick and cheap. My mother was the master at creating recipes out of hamburger. Hardly anything to brag about, but I am sure it was quick and within budget. This book is much of the same. All the traditional incarnations of hamburger are well represented. Basically it is either a loaf, a meatball (this cookbook calls them burger balls), or a dressed up hamburger sandwich.
Nothing that spectacular and as a cookbook, the directions are written rather broadly and there are no illustrations. My advice: stick with the family meatloaf recipe and don’t get cute trying to make hamburger something more than it is.