Beasts. Upstream. Book 5

This time Abeke, Conor, Rolland and Meilin go to the Hundred Islands. Somewhere there lives an octopus Mulop - the owner of another mascot, so necessary for the victory of the Green Mantles over the Devourer. and again the invaders advance on the five brave fours. Someone is passing on information about the movement of children associated with the Great Beasts. Who is the traitor? Abeke? Conor? rolllan? Meilin? Everyone's head is spinning with suspicion and despair. In addition, the Green Mantles again face difficult challenges: a trip to the island of Night Shadows, which is considered a cursed place taboo, a trip to the camp of invaders, located on the island of Monsters, a trip on the back of a giant stingray Kingray to Mulop.
Not everyone is lucky enough to return from a trip. Who will side with the invaders? Who will be captured? and who is lucky enough to break out of the traps of the Devourer? And most importantly: will our friends lose their mascots?