Dinosaucers (Dinosaucers #4)

The Secret Scouts and the Dinosaucers team up against the Tyrannos in an all out war! With a plan up their sleeves to exploit the Tyrannos' weakness, can the Secret Scouts and their new allies take down Rex and his armada? Meanwhile on Reptilon, Quackpot unleashes a secret weapon against the Resistance-but Princess Dei has a secret weapon of her own!