re: Question regarding gluing veneer

Thanks for the advice from your life's lessons gentlemen, very much appreciated. Now I think this old dog is barking up the wrong tree here, and I'm wondering how this bookcase would look with a dyed plywood back. It'd be a shame not to use this beautiful veneer, but even a bigger shame to screw up the whole thing with a shabby back.
Thank you all for your input, your experience & knowledge will give much to think about while I finish the trim & ornamentation on this.