In life, people can pick one of three strategies. The first is they can fantasise about what kind of car they want, what kind of job they'd like, what kind of girlfriend they'd have, and then try their best to make these "achievements", often falling short because the world is not fantasy. The second, they observe what kind of random elements the world exhibiting, e.g. "Oh these days accountants make lots of money", "These days Software Engineers have high salaries" and directly translate to mean "I am going to learn programming, even if I don't like it", and then they are playing to other people's fantasy rather than accepting their own strengths or weaknesses. Or thirdly, they can "play to the board" and make the best of what life gives them, at each moment in time.
The bookshop-keeper here, is eking out every single edge he can out of books to operate his shop. Where 30 years ago operating a successful physical bookshop might mean having a large selection available at any time, and frequent events to draw crowds, today, in competition with digital books, operating a successful physical bookshop might mean emphasising the advantages of the physical book, the romanticism attached to physical objects. I get the feeling he is the type who sees what the world is like today, and because he's got experience bookshop-keeper, not a software engineer or tech startup founder, he goes with the flow with what he's got.
Where in a board game, the game board is the entirety of the world, and can be considered by itself, in the real world, our own selves are part of the board - and I can't always do it, but I aspire to do what I can to play with what I've got, like the man depicted in this article.