Google Book Search (by subject)

Google Book Search has a new (or new to me) 'subject' advanced search option.

There are 72 full-text books for subject 'coins', 123 for subject 'coins, greek', 132 for subject 'coins, roman' and 32 for for 'coins, ancient'.

'coins, american' yields only 1 full-view title, Catalogue of John W. Haseltine's Type Table of U.S. Dollars, Half Dollars & Quarter Dollars, also Many Other Rare and Fine Coins ..., a Bangs & Company auction from November 28-30, 1881

The quotes are important if you enter the comma. A search for coins, american yields 0 hits. coins american and "coins, american" both yield titles.

Although there is only one full-view American title, there are 4 with limited previews and 600+ searchable 'snippet view' titles.