Hi Marcokeris, welcome to the forum.
A nice book indeed. I've partially read the book... a thick book with excellent quality pictures and many high quality kerises featured. Coupled with
Ensiklopedi Keris by Bambang Harisnuksmo would cover quite a lot of info about Javanese kerisses.
I believe, currently the English version is being translated and would be made available. When? I don't know.
The cost of the book is quite hefty but the contents and quality of print is of a high standard.