I always have several books going at once. I've done this for as long as I can remember. Maybe it's a sort of literary ADD. I don't know. Anyway, the Kindle is a great invention for me. Here's what's on my ereader right now, in no particular order:
Freethinkers: a History of American Secularism, by Susan Jacoby
Moby Dick, by Herman Melville
Leaves of Grass by Walt Whitman
The Woman's Bible, by Elizabeth Cady Stanton
The Bhagavad Gita, trans. by Stephen Mitchell
Books are great. Ebooks are awesome!