Monsters of the Mind

When someone tries to kill Bell's friend, Kimiko Okamoto, the Wildermuss children go in search of her attacker. With the help of Monty, their ape friend, Lyse, Bell, Ben and Carson must first fight--and flee--their way to a truth so unbelievable it can't be true. But before they reach that truth, they'll encounter dinosaurs, smalls one, deadly robots, big ones, and a host of other dangerous and creepy entities that threaten their lives.
Yes, strange things are happening at the tech convention, and all Bell thought would happen was that she would give a very boring speech.