Devolution Day

Never eat your sister.
Good advice, but sometimes hard to follow as a storm of devolution sweeps down on the Seattle library, transforming the patrons into saber-tooth tigers, tyrannosaurs, twelve-foot pink centipedes, and all manner of exotic, extinct, and eviscerating creatures. Few humans escape these horrific makeovers, and those who do find their celebrated cerebellums toppled from their perch atop the evolutionary tree in a contest against fangs, claws, beaks, and giant stomping feet.
Caught on the top floor, Darcy and Schuyler undertake a desperate voyage to descend past the chomp-monsters to salvation. Only to find themselves hunted by …
gerbils?
Yeah, but like really, really big gerbils. Eight inches tall! With slingshots! And if you ain't scared, man, you ain't right.
Join us in a do-or-die Lost World saga of fire and mice.