I'm currently reading
Cleopatra: A life by Stacy Schiff. I bought it way back when I first got my Kobo, but had abandoned it in favor of reading some fiction at the time.
Now I'm taking a break from fiction (since I'm writing so much of it lately) and reading some non-fiction instead. It's pretty good, fairly narrative, though she has a tendency to meander a little bit.
http://www.kobobooks.com/ebook/Cleop...QQw/page1.html