This is book number six of this series, so someone must like them, however, I find that hard to believe.  This story goes all over the place.  The first scene is the pet shop owner is no longer selling pets and instead is purchasing odd supplies for odd animals.  No wonder he’s going out of business.  Then, as he needs to sign for a delivery, he can’t find the pen that’s obviously behind his ear, and calls it a store robbery.  C’mon, kids aren’t that easily entertained or fooled.  This is a waste of ink and paper.