In my experience, I've found the following to be inappropriate for wrapping books for mailing: parchment paper, seaweed, hot wet cloths, thin flat pieces of bread, or babushkas.

Whereas I would argue that a babushka of the grandmother sort might be just what one needs to get a book through the perils of the postal system. She could speak to them every step of the way about why this parcel isn't being expedited, why it's hanging around in a sorting hamper, why isn't the DC being scanned, etc.  I should think the postal persons would be rightfully beaten into shape.

Unicorn hair, in my experience, is the best wrapping, as it never rips and it glitters so brightly.  But I have not found a reputable vendor on eBay to keep me supplied... the last one sent me fairy floss, which they were claiming was unicorn hair, and my parcels were a disaster ...

Before wrapping, I always dip the book in glue first and set it aside to dry. This prevents any water damage during shipment.

My new favorite thread

I get all my book wrapping done at Santa's workshop since we all know that elves are such perfectionists.