The ISBN of Fall of the Hulks is 0-7851-3985-0.

Rulk. Why do I say this? Just read read Fall of the Hulks/War of the Hulks/any Red Hulk graphic novel they can get. They're really good too, best I've seen from Marvel in a while.

the avengers

Prisoners on the hulks did nothing. they were moored in the hulks on the Thames, so were kept under lock and key, where they were not permitted anything by way of entertainment unless they were one of the few who warranted a visit from friends or family.

Its a type of ship