According to the US General Accounting Office, two-thirds of pennies are out of circulation, with many of them disappearing almost the moment they reach the public.

BBC: The US penny: Should it be scrapped?

When they approached the circulation desk to check it out, the librarian looked at them with a touch of respect in his eyes.

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Is this, then, a test case for publishers who could work in tandem with the fans of underappreciated and out-of-print books to bring them back into circulation?

FORBES: Kickstarter Creates New Demand For Children's Classic

Eurogamer, with an audited circulation of 5 million unique users per month, plans to roll the service out to its European-language sites also.

FORBES: Eurogamer Ties up with Gaikai - Web Gaming for 5 Million Visitors