There is a poll that just went up at the Hardy Boys Community on Google+ asking you which one of the most recent series is your favorite. Let's head over there and let everyone know!
https://plus.google.com/+HardyBoysCasefiles/posts/foJtLCTEixd
Cool! Thanks for the heads up. I would generally say every Hardy Boys series is my favorite in some ways. :) 8) I like all of them to some degree. I will say though that The Hardy Boys Casefiles and The Hardy Boys Digests books are some of my favorites to read though. But they're all good overall for me.