my most recent book about V9 is available since November last year here in Europe. Unfortuantely no translations are planed and I doubt that this will change in the future. Translation costs are too high and take too lnog to justify the effort for most publishers. They make more money with native writers.
As you can see by a quick search at Amazon.com, the number of available titles about Cinema 4D has increased by a large number over the last year. If this continues, you should have more titles to choose from in the future.