For those times when you're looking to focus your coin collecting attention, there's the 2012 versions of Coins of the World digital download series.
In the 2012 Coins of Great Britain electronic download you'll find detailed descriptions, current values for multiple condition grades, and actual-size illustrations for everything from decimal and sovereign coins, to bullion, trade, patterns, and Maundy Sets.
Plus, with this easy-to-use download you can search by keyword, or click on chapters within the index to go straight to the first page of a specific section. And you have the ability to enlarge each page several percent to give you a closer view of descriptions and coin illustrations.
This download is Mac and PC compatible.