Book 32 of Animorphs. This book was a fun twist on the Dr Jekyll and Mr Hyde story. A definite look at the juxtaposing personalities in all of us. While there is a confrontation with the Yerks, this was mainly about the group themselves. And I did like that the ending like so many in this type of story was at least attempted to be explained in a sci-fi way. Overall I enjoyed this one as a fun twist on that old classic.