I just finished Time and Again by Jack Finney. I'm not much into science fiction, so I'm not sure why I picked it up (Did somebody on the board mention it recently, here or another thread? I couldn't find any reference in a quick search). What a clever novel! Meticulously researched time-travel caper that surprised me with some of its twists, though I saw the last one coming. A little slow in spots, but I think most science fiction is because there is so much explaining to do.
Very enjoyable, highly recommended, probably the most memorable novel I've read in years. I'm about to start the sequel (it took 25 years for Finney to get to it and was published right before he died) and hope it is not disappointing.
Past is gone, thou canst not that recall; Future is not, may not be at all;
Present is, [so] improve the flying hour; Present only is within thy power. - Friar Park Clock Tower [author unknown]