"Who is Clark Kent's Killer and Why is He Doing Those Terrible Things to Me?"
Someone is trying to kill Clark Kent and not even Superman can figure it out. Hopefully with the help of an inter-dimensional detective Superman will be able to save poor Clark Kent.
"The Secret Olympic Heroes"
-Reprinted from Teen Titans (1966) #4.
"The Baffling Block of Metropolis"
The secret behind the construction of the massive door of Superman's Fortress.