Hey everyone, I'm a huge Hellboy and BPRD fan and while I have all of those books, I passed on Abe's books because I'm trying to cut down on my collection. Anyhow, I kind of regret not buying the Abe Sapien HC's and now I've been thinking of getting them.

My question is, how many are there and which books do I need to buy to get caught up? Also, which ones are the best? Thank you