"Magic. Like..." She picks the book back up and then focuses before determining a space right on front of her, solidly away from Feste. Then she shoves it into a crack in between that space and another...

...and lets it drop out on the other side. Which is twenty centimetres above Feste's head. The book falls down and hits them on the head.

One day she'll echo back paradox and its effects. Luckily that hasn't happened yet.