It appears that the two photos from this website are the same turret bunker due to quite a few indicators. However, I am not sure that the one pictured in Steve's Atlantic Wall Normandy book.
The location of the one in Steves' book is identified as WN68 and in another source, Omaha Beach by Georges Bernage there are good maps showing where these bunkers were located. One was very near the beach while another is marked as being next to a structure (house?) which may be the structure that is shown next to the bunker in picture linked below.
http://www.network54.com/Forum/78970/message/1239997898/Another+pic+of+the+VK-3001+turret
If Steve is listening in, can you determine if the photo in your book is of the same turret shown in the picture linked above? Or was it perhaps the bunker located closer to the beach?
Thanks,
Cliff