Start by reading Heinlein’s “By His Bootstraps” (1941), and then read this one. You’ll enjoy both and stretch your mind around the first ex nihilo idea that we’ve spotted in comic books. Note that the half blueprint itself does have an origin, and you can trace it’s timeline from that origin to the past and back again. It’s only the concept expressed in the blueprint that has no origin.

Physicist Don Hartley has a plan to save his beloved Adele, who died in a car crash on a hot July night.

When a mad scientist with a time machine gets together with a power-crazed university president, the result is deadly (and time travel aspects of the plot makes little sense).

Cleaning man Donald Yubyutch is fed up with everyone at the time travel lab thinking he’s nothing but a shmoe.