EVER SEEN A WALL TIE ITSELF INTO A KNOT?

Lynn Reid has, and that's not even the weirdest thing that's happened to her in the last ten minutes.

Lynn's ability to see things outside human perception makes her the ideal candidate to join the multiverse police. After a bungled first mission and an unfortunate encounter with a basketful of anchovies, Lynn starts to wonder if she's really cut out for multiversal work. When she turns to her copy of the Field Agent's Manual for reassurance, she stumbles across a faded note that leads her to a cover-up spanning two decades and several worlds.

Now, Lynn must uncover the damning secret behind the note before the next End of the World, Amen.