I'm reading the 163X series by Eric Flint and others. Starts with 1632, it's about a year-2000 West Virginia coal mining town that gets transported back in time to Germany in 1632 in the middle of the 30 years' war. A smackdown ensues. Nothing deep here, but some creative stuff and a good old-fashioned romp. Plus some good history lessons about a time period I know nothing about. (King Gustav II Adolf of Sweden was apparently quite the man.) Continues in 1633 (with David Weber), Ring of Fire anthology with various people, some 1634 books (with yet other people)...I believe a total of 5 books are out now, but something like 15 are in the works. You can read at least 2 of them online for free at baen.com/library.
I'm also reading Ben Bova's Grand Tour series. I'd read Mars and Return to Mars years ago, and I might have read one of the Moon books back then too, but I just recently picked up book 1 of the Asteroid Wars and that got me started again. Read the 2nd one of that too, and various others are in queue. I don't think Ben Bova is a very skilled writer, but he's been turning stuff out in volume in the last few years. Very golden age-flavor stuff, though obviously written recently with the stuff like nanotechnology, greenhouse warming, and the political situation on Earth. Even less deep than the 163X books. But not a bad waste of time.