My father owns a bookstore and would use surface M-bags, while they existed, to ship things to customers overseas (with their permission). I believe he never ha

My father owns a bookstore and would use surface M-bags, while they existed, to ship things to customers overseas (with their permission). I believe he never had a problem with significant damage to the contents. I agree it's got to be riskier for books than the airmail options, and I'm very sorry to hear of what happened to your books when you used it. :-(