Superman, Vol. 1

Danger: Monster At Work - Superman collects algae samples for S.T.A.R. Labs, which mutate them into atmosphere cleaning orangisms. While Clark deals with vigilantes in his apartment building, the algae gets out of control.

Marriage, Kryptonian Style - On Krypton, a computer determined who should and should not be married. What happened when it told Lara and Jor-El that their marriage was forbidden?

There Is No Superman - Reprinted from Superman #40