High res pic I took six years ago: 
The card reads: Warmest greetings from the DuMont publishing house. Have fun reading it!
The cover reads: Help, my cat is broken! 200 cats going beyond their limits
NGL if they used your photo on their cover, sending you a few copies of the book is the least they can do.
Since it's a product being sold, and you're the copyright holder of the image. That means they should not have been using that image without your explicit permission...
technically you could sue them, and I bet them sending you copies is their way of trying to buy out the fuckup so they don't get sued. In theory you could demand a set percentage of all sales...