For my money, the best of the bunch is issue 13 (a k a, SUPERMAN 252) a fantastic collection of Golden Age material.

http://12comic.com/issue.jsp?id=190227082243rrn2&cu=9

* a 2-part Superman story from 1942 issues of ACTION COMICS 47 and SUPERMAN 17, signed Siegel Shuster (but ghost art by John Sikela).
* A Jim Sherman Dr.Fate story from MORE FUN COMICS 57, July 1940.
* a Moldoff Hawkman story from FLASH COMICS 24, Oct 1941
* a Lou Fine Black Condor story from CRACK COMICS 18, Nov 1941
* a Bernard Baily Spectre story, also from MORE FUN COMICS 57, July 1940.
* a Jack Burnley Starman story from ADVENTURE COMICS 67, Dec 1941.
* another Lou Fine "The Ray" story from SMASH COMICS 17, Dec 1940.
* and the odd story out in the bunch, an Al Plastino Superman story, from SUPERMAN 146, July 1961. I wish this one could have been another Golden Age story to fill out the book, maybe a Jack Cole POLICE COMICS story, or a Lou fine Uncle Sam story from NATIONAL COMICS.

But regardless, it's a great representative collection of stories, from the core of what are considered the peak years of the Golden Age.