Title: They walked like men
Description: Money was worthless; it had no value! It couldn't buy housing, clothing, or food. Someone with enormous quantities of cash was buying houses and tearing them down, buying stores and closing them.

Perhaps a few people could have stopped the transactions before it was too late. They could have said that Earth was being taken over by alien beings in the shapes of bowling balls, talking dogs, and dolls that walked like men. 

In fact, they did say it. The trouble was, no one believed them!
Subjects: Fiction in English, Fiction, Science Fiction, Human-alien encounters in fiction, Human-alien encounters, Large type books, American Science fiction, Fiction, science fiction, general