I diidn't make this public, but when my good reputation is attacked I defend it.
Ok, so now that the missing book is resolved....
What reason are you giving for not paying for the return shipping? There is still the issue of the re prints, that I believe he specifically asked you about before you sent them.
I just told him I will send him the two he is complaining about, and by the way the lot was for 115 comics.
The number of books is irrelevant. If he didn't get everything he paid for and in the condition described, its up to you to make it right.