and I am suggesting A book connected with a garden
That should give you some scope - even if the only one you can think of is Frances Hodgson Burnett's The Secret Garden - but honestly, there are loads. I'm going to read:
This is not about gardening, but the author was a gardener. Sissinghurst is one of the most famous gardens in England, and it was she who designed it and worked on it.
So enjoy your garden - on paper or sitting in it, or both. Happy July!