The turtles are having an ordinary day in the sewers when Donatello makes a great discovery. He discovers that one of the turtles aren't related to the other three! It turns out to not be that great to the other turtles, or to at least one of them. After a few disagreements about Donnie's discovery, the family starts to fall apart. And when you think the worst has come, there's alway more bad things coming! (Book 1 out of 2) (Book 2 Our Worst Nightmare) (Completed 2015)