An interesting and horrifying possibility for your book could be that of a tiny black hole with negligible mass relative to the mass of the Earth. It would silently sink into the ground, completely unnoticed. It would make damped oscillations around the center of the Earth until eventually staying within the nucleus. There it would stay unnoticed, slowly growing like a parasite. The Earth radius would start to diminish, and thus the crust would have to adapt by means of earthquakes - very weak at first, but of increasing frequency and strength. Eventually, the chains of volcanoes would appear along giant fault lines, heating and poisoning the atmosphere, bringing total obliteration. After that, the Earth would continue shrinking until all that was left would be a tiny black hole with little more than one Earth mass in the place where our planet was. And the moonMoon would stay there as a horrified witness of the catastrophe.
Nothing on Earth would be able to stop the process and save us. Nothing except Chuck Norris.
Note: Classical GR black holes are fully determined with just three values: mass, electric charge and angular momentum (No-hair theorem). If the two later are bigcharge is large enough in the black hole of your novel, then the hero might be able to stop and confine it by using strong magnetic fields.