The Cliff, Book 4

Mutt Blue never knew who he was until he escaped his father's mountaintop fortress, fell in love with a suicide, stumbled into another world and encountered Poopsie, the Private Eye Penguin. Now they arrive in the chaotic and labyrinthine city of Varanasi on the Ganges River, where they must find who murdered Carlos Brown-Wishy Washy Detergent billionaire... and discover the secrets of their own inner hearts before the city, their pasts or their own friends kill them.