Yes.
Each book is first wrapped in shrinkwrap, then enclosed in a purpose made cardboard wrap, glued shut and posted as a single book.
The size and weight of this packaging means it is able to be posted via Royal Mail as a SMALL PACKAGE, thereby cutting down on cost.
Two books in one package would require different size cardboard outers and a repricing of postage.
I feel as a self-published book and the fact that I am wrapping and glueing and posting the packages - this was the simplest way forward for me.
If you wish to collect the book/books. I can supply you with my address - you would be surprised how many do pick the book/books up. Something to do with the fact that they are then able to see the finished models in person.
I hope that this helps and answers your query.
Regards
Tony