can anyone recomment some books on JNI?

I'm a new jni coderI hava just finished the JNI topics in the book of "java core"I searched the internet for several hours but cannot find a good book about advanced JNI~~
[193 byte] By [purebeggera] at [2007-10-3 10:49:38]
# 1
"Essential JNI"
bschauwejavaa at 2007-7-15 6:14:33 > top of Java-index,Java HotSpot Virtual Machine,Specifications...