JSWolf, there's a LRF file posted by Madam Broshkina here:
https://www.mobileread.com/forums/showthread.php?t=28418
I don't have a Sony reader so I don't know if it has a TOC. But you're right, the book's structure (lots of short chapters) means a TOC is a pain. Something I should have thought about a few years ago when I started writing ...