The Ever-changing Tides~ (PJOxHP)

Sirius Black has a secret that no one knows. Not even his brother in all but blood James Potter.

When a stack of books randomly pops up in the great hall and alludes to an entirely different world, will Sirius's secret stay that way for much longer?

In which the wizards, demigods, and gods watch their past, present, and future so that they can be better prepared.

Sirius Black x (fem) Percy Jackson

I do not own the Percy Jackson or Harry Potter characters or storylines. I only own Persephone and any original scenes that I write.