By the end of the 40s Superman has gone off the rails
The story 'Superman Returns to Krypton' came out in the November/December issue of Superman in 1949.
It tells the story of how Superman encounters Swami Riva - a huckster fortune teller who somehow has the power to 'hex' Superman. The source of his power leads Superman to discover his own background.
The story has some good things about it. For one, it features the art of Al Plastino, who is probably the best artist to work on Superman in the Golden Age. When you think of Golden Age Superman stories, chances are it's Plastino's art that you're envisioning.
It also introduces Kryptonite for the first time - which could be a positive or a negative, depending on your views on Kryptonite as a plot device.
On the other hand, it contains A LOT of the things that set Superman off on the road to becoming an annoying, detestable, all-powerful God-being. For example Superman (who couldn't even fly earlier in the decade) now not only flies through the air, but can now fly through interstellar space - far beyond the rays of Earth's yellow sun.
A ton of other powers are displayed just in this one story including, multiple uses of super breath, Superman being able to fly faster than the speed of light, Superman breaking the time barrier (complete with a hokey excuse that he's invisible when he travels to another time), the revelation that Superman can read lips, and Superman is also a Master of Disguise.
In short, just about everything that was wrong with Superman for decades was here. Unless you are so obsessed with the character, or have some terribly compelling reason, I would encourage just about anyone to avoid this story.