Simple Meme: What book are you reading now?

An easy-enough meme from SF Signal-- answer the following four questions:

What Book Are You Reading Now?
Why did you choose it?
What's the best thing about it?
What's the worst thing about it?

1. Tower of Glass by Robert Silverberg. I'm about halfway through.*

2. I realized, after picking two of his stories for my list of The 10 Best Science Fiction Stories About Religion and reviewing Downward to the Earth, that Silverberg really is one of my favorite authors (with a bullet). I'm not...