I know it is U.S coins but this stuff will keep you busy for at least a year or more. I know I love reading about coins and if you like it to these books are for you. Some are quite cheap and some are a 100$ but for a 100$ you have at least a months worth of reading so to me that's a good deal.
100 Greatest U.S coins 3rd edition (the 4th edition should be out this year because every 4 years the new one comes out);
100 Greatest American Currency Notes;
Double Eagle (full story of the 1933 20$ gold piece and story that involves the Egyptian king, the C.I.A and many other people);
Million Dollar Nickels (1913 liberty head nickels);
The 1894-S Dime, A mystery Unraveled;
The rare silver dollars dated 1804 and the exciting adventures of Edmund Roberts (Almost like the movie Indiana Jones and this is a big book);
American coin treasures and hoards (almost like the movie The Goonies a lot of good finds again a big book. Only place to find one is on
Amazon because it is a rare book);
and
The Harry W. Bass, Jr Museum Sylloge (all about the only man to ever own every single U.S coin and his famous gold coin collection).