Thanks, Eric, for taking a crack at answering my question. I googled for information before asking, and really couldn't find a definitive answer. The reason for my asking is because after I posted a scan of my "Cave Girl" book in another (wrong) thread, I got to thinking that it might be considered a paperback book, and not a pulp. That made me want to find out for sure what the differences are. I was thinking that maybe the date published or even cost might be the difference. Again, thanks for taking the time to help.