Was off for a while, and when I checked the forum, wow! A new offering! Still in the middle of Strange Attractors, but the title "Mars Girl" quickly got my attention. Welcome aboard, Mr. JG.
Now, some input on the ebook?

Sometimes we take for granted putting a piece of paper between pages of paper books to mark the page we're in. In ebook, we have bookmarks and stuff. Then again, sometimes those 'go to last page read' bookmark might get erased or whatnot. Hence, proper TOC in ebook.
Personally, I have my own preferred ebook format that i chose everytime i buy ebooks from fw, powells or ebooks.com. The format provides (and when the publisher make it properly) TOC and it's very helpful. Try reading a 1,600 something pages in a windows-mobile phone/pocketpc. Without proper TOC, one might spend quite some time to look for her/his last read page.
After I downloaded and start skimming through the pages of the .lit version, one thing comes to mind: let's do this properly.... Cover page, TOC, copyright page (yes, i believe this should be an important part of the book), perhaps reference to other works, _about_the_author, then the package would look much nicer.
I'd be happy to help