[mothered]

Best thing I can think of is books but it would have to be multiple books? Perhaps a tablet of some sort? I think I’m just overthinking it really

You're not overthinking at all, but rather thinking of all possibilities which Is good practice when SEing.

Multiple Items (books In this case) Is fine. As long as they stock It, that's all that counts.

Multiple books it is. I was just thinking of all possibilities and what they might think and it was messing with me a bit. Thanks for your help.

You're most welcome with all assistance given.

As said, the stock Item can be anything. As far as they're concerned (In this case) they've picked, packed and dispatched the books.