Body Talk is quite a prolific circle, famous for their shoujo-ai Sailormoon doujinshi.
They do both mild and hentai works, and I think their mild ones are quite nice. Their
favourite couple for mild stories is Rei&Ami, and for spicy is HarukaxMichiru(and sometimes xUsagi as well). There are two
artists, Lemon and Milk. I like Lemon's style better, but Milk is better-known, especially as she did all
the covers and has now gone on to Utena & Evangelion dj, without Lemon I believe. But still, if you like Sailormoon, these are OK. I'm
not a huge SM fan but I think Ami, Rei, and Michiru are all nice characters, so I rather like the Body Talk book I have.