This is a catalogue where you can find all the coins that for various reasons did not make it to Standard Catalog of World Coins (a.k.a. Krause). Some of them were issued without consent of the countries for which they were allegedly produced, some were produced as souvenirs never meant for circulation, some are the produce of enterpreneurial spirit, while some are simple fraud. The volume which has grown since last edition by over 180 pages includes all the latest crazes on the numismatic market - the euro coins issued for territories which do not issue separate coinage (Madeira, Azores), do not issue enough real coinage (Monaco, Vaticane) or do not use the euro at all (Moldova, Belarus etc.), and various African coins - both those denominated in africas and those issued "for various African tribes". You will find here also some quite genuine and (well, almost or quasi) official coins as well, such as Swedish and Norwegian "largesse" money (distributed at various royal feasts) or Swiss "shooting thalers".
It is good to have the catalog for two reasons - you may finely locate some coins you bought because they were nice and strange, and you may see what people can do to make their dreams come true. Obviously, some dream of establishing their own states (Hutt River Province, Minerva), some dream of living in the past or in literary fiction (Shire, Middle Earth), and some only dream of getting rich quick (well, almost everything else in the volume...).