New York Times bestsellers and sewer surfing super-sleuths Mango & Brash are back in the seventh volume of the smash hit InvestiGators series! Unsinkable detectives Mango and Brash are back in InvestiGators: All Tide Up, a high seas adventure that takes the hit series by John Patrick Green to uncharted waters! When a cruise captain is found drifting at sea and delirious, the search begins for his missing ship and passengers! Did it...