A reason to travel is to find a soul mate. I found mine on the back of a truck in South America a long time ago. We have very similar interests on a personal level, but very different professional interests. Relationships can often be adventures.
We have plenty of books to keep our minds occupied in relation to our shared interests as a married couple, and also many, mostly second-hand books on our many individual interests. What are the interests you share - or wish to share - with a soul mate?