For my money, Joe Nickell is the best. He’s written several books about investigating the paranormal.
Ben Radford is another good one.
Edited to correct the spelling of Nickell—it has two L’s.
It’s good that you want to do some research on this, and that you’re aware that you might be biased. I remember when I was a teenager I read everything I could on the paranormal, and at the time I was convinced mainly because all I ever found was pro-paranormal books. It wasn’t until my mid twenties that I started finding skeptical literature, and the difference was astounding. It was like the pro-paranormal books just told you a story. The authors didn’t seem to make any attempt to verify how much of it had really happened. The skeptical books on the other hand did try to check things out, and the result was they seemed much more plausible—at least to me. I’d be interesting in learning if you’ve changed your mind at all after you do some more reading.