freaky book update

I talked to my dad today. He also got me a USB VoIP phone for Christmas, which is cool, except that after not having spoken to him for a few months, I was already out of things to say within 20 minutes of him doing most of the talking. Luckily, skype has the option to be invisible.
Sadly, the worst case scenario seems to be true. He did actually read the book before getting me a copy. He didn't come right out and say he believed it all, but he did say it had "a lot of interesting stuff in there". It sounds like he's working his way through his wife's fairly large library of mystical/new age/SF books (she actually makes a distinction between the first two and the last categories). He also talked about wanting to get "the Poisonwood Bible" for some friend's missionary kids (for its anti-missionary stance, rather than literary merit) and commented on the uselessness of anti-depressants, saying what helped him was just going overseas and getting out on his bike. I did manage to partially stick up for the benefits of medication, but I'm kind of wishing I hadn't warned him that I didn't notice the mennonite missionary sponsorship of the recipe book I got him until I'd already got it home. It might have been fun to see his reaction if he thought I was trying to convert him...
The awkward conversation about anti-depressants came about because he'd heard that I was taking them earlier in the year. I'm not sure if he brought it up purely to promote the merits of cycling, or to say he hoped I could talk to him. Maybe he realised that the previous phone call's tactic of asking if I was okay twice wasn't enough to get me to open up.
Am I supposed to be able to have long conversations with my dad? I feel mean for dreading the idea of frequent contact, but I have nothing to say.