We're turning vintage classical novel covers into T-shirts (side project)

My wife and I are experimenting with a small side project: T-shirts inspired by vintage covers of classical novels we love. The idea started as "would we actually wear this?" and turned into a tiny collection.

We even made 1 sale, the customer loved it, that made us very happy and motivated :)

We're still early and very much in exploration mode, so I'd love feedback. Anything I should do add/remove to the website also counts. :)

If you have favorite classic novels, cover designs, or sites/resources about vintage book art that you think we should look at, I'm all ears.

Thanks in advance