If your dad's idea of a good time is sitting quietly in his armchair with a good book or crossword puzzle, conventional Father's Day gifts probably aren't going to fly.

But there are plenty of gift options out there for bookworm dads.

Let's start with books. If your dad is into them, you probably know what kind he likes. Ask Mom if he's hinted about wanting any particular books; otherwise, take a risk by picking something from USA Today's list of this week's top 150 best-sellers or from the New York Times' book reviews.

Or get Dad an award-winning book. Barnes & Noble has lists of winners of the Pulitzer Prize, National Book Award, Nobel Prize and more.

If you're not comfortable picking out a book, a gift card to his favorite bookstore will never go to waste.

Magazine subscriptions -- both print and online -- are another hot gift idea for the well-read dad. The obvious choices are Time and Newsweek, but don't forget such gems as Slate, BusinessWeek, and Wired News.

If your dad is a wordsmith, a subscription to the New York Times for its daily crossword puzzles would show you really "get" his hobby. An online subscription would allow him to compete against other puzzlers or against the clock.

Other ideas for a crossword-puzzle addict would be a handheld computerized thesaurus or a good reference book, like the "Dictionary of Cultural Literacy."

Of course, every guy is different. Remember, the best gifts come from the heart. Dad will love that you remembered him and made an effort.