Subject only to a bit more light editing, I seem to have finished, at last, a complete draft of the book on literature and high-end inequality that I started in 2014. I'm usually a fast writer, but in this case I had to spend years deciding exactly what I was doing and learning how to do it well. Plus a whole lot of disparate research was required for each new topic. And I wrote long chapters that I subsequently deleted from the project and published separately as freestanding law review articles. Etcetera.
My current working title is Dangerous Grandiosity: Literature and High-End Inequality Through the First Gilded Age. This, too, has changed multiple times in the course of the project. I would certainly be willing to discuss alternative title suggestions with a publisher, as they can often come up with something crisp and salable.
Whether or not this book is either the best or the most important thing I've written, I think it is my favorite, although this partly reflects the particular tastes and values that led me to write it. (I can be very self-critical, although I generally prefer to keep that to myself.)
I've talked with a couple of editors / possible publishers in the past, but before I had fully nailed down the project. My aim was not just to gauge interest, of which I found some, but also to get feedback, which several gave generously and which I found very helpful.
The book clearly has more upside sales potential than my tax policy books, but also less of an automatic built-in audience, and I don't have the same instant cred when doing something like this as when writing about, say, corporate or international tax policy. That's fine, I'm willing to earn it and feel that the book is up to this challenge. (And I've gotten positive feedback about particular chapters.) But I do now face the question of how best to go about publishing it. E.g., university press versus high-brow independent press, and it really needs the right fit to get its best shot at landing audibly.