This is the newest book on HK that's available. This book is now available in the US and has been translated into English! This particular copy is written in German, but much like a National Geographic, you get the gist from just looking at the pictures.
This is a great coffee table book that spans the 50 year history of HK and is very comprehensive. The book sells in Germany for DM170 which is about $90 US and sells in the US for about $100. It's not cheap, but then again, nothing having to do with HK is. This is a must have for enthusiasts and collectors of HK.