What is the value of reading & thinking about reversible novels?

The only answer to the question I pose in the title is that it loosens our assumptions and perceptions, making our world richer, subtler, and more nuanced. In a variety of ways we can join with others interested in this stuff, helping to create a culture of greater richness and subtlety, hopefully one less easily controlled. It's not surprising that the artists, especially the experimental artists, and the intellectuals are among the first rounded up by abject dictators.

That's the value: it insists on the complexity and richness of life. And this is a threat to dictators who need to keep things simple.