The English version of the german book on Linux Kernel Programming is published by Addison Wesley. Here is the text of the mail I recieved from Addison Wesley when I enquired about the book :

"LINUX Kernal Internals" is priced at $38.68 but will not be available until early June 1996.

Ordering information:

The Book Express will gladly ship your order to any international location. Orders can be prepaid by a valid credit card or a check drawn on a US bank. Orders are shipped to international locations via Air Printed Matter Registered with an estimated delivery time of eight business days from our warehouse in Indiana, USA. Charges for this service are $15.00 for the first book, $8.00 for each additional book on the order.

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Sincerely, ADDISON-WESLEY BOOK EXPRESS