These are Rather Awesome (in case you hadn't noticed).
Hellboy works for the Bureau for Paranormal Research and Defense (B.P.R.D.). When Hellboy leaves the Bureau to take care of some Hellboy stuff, the team makes due without him. This book is brilliant. I love Mike Mignola's artwork, and so was reluctant to read a spinoff drawn by someone else. Tut tut! How lame that I went so long without it. The artwork is very effective for the story, but that's the thing --the stories are amazing. The stakes are real, and they are high. I'd always been a huge fan of Abe Sapien, but in BPRD everyone is masterfully developed. Roger the Humunculus is definitely one of the best characters in any comic, ever. I would suggest getting through the first five volumes of Hellboy so you can truly appreciate the where the Bureau is coming from, plus the origin story of Roger and most of the other agents. The first collected volume of of BPRD is called Hollow Earth and Other Stories. It's fantastic, but volume two is kinda all over the place. By volume three things are more cohesive and volume four and five will just knock your socks off. Unless of course you're lame. If all you know of Mignola is that tragically mediocre Hellboy movie, please, don't make any hasty judgments. Both Hellboy and BPRD (and The Amazing Screw-on Head!) should be available at a comic shop near you, Hi De Ho if you're in Los Angeles, or Amazon if you're bedridden. If anyone ever wants to come over and have a big comic potluck reading party just let me know.
More Rather Awesome things one might want to check out, coming soon.