Any ideas for grandad's christmas gifts?

[RainingCatsandDogs]

Both for dh's grandads in their 80's.One likes gardening and the other reading (but he used to own a bookshop so has read most things).Budget £20-30.
I can't come up with any good ideas..

subscription to Granta for the bookish one

here

subscription to a gardening magazine for the other?

My 92 year old grandfather is getting a very nice bottle of wine and some home-made shortbread which dd helps make. Will probably get her to decorate a card for him & Granny too, as they love stuff from the grandkids.