Book on German Night Fighter Squadrons by Heinz Rökker

I am researching a story for a work colleague whose Great Uncle was an RAF Observer on bombers in North Arica and was shot down by a J.88C night fighter flown by Hauptmann Heinz Harmstorf

Heinz Rökker, one of the most successful night fighters of all time, wrote a book all about the night fighter squadron he flew in called ‘ Chronik I. Gruppe Nachtjagdgeschwader 2 I./NJG 2 Juli 1940 bis Kriegsende 1945 Fernnachtjagd 1940-1942.

In this book is a rare photo of Heinz Harmstorf, and I wonder if anyone has this book - and, if possible, they would send me a photo of Heinz Harmstorf to complete the story so I can present it to the family of my work colleague.

Many thanks in anticipation