Recently, I decided to collect all of the MK1 books for Warmachine. Since I mostly played Hordes during the MK1, I had all Hordes books (and I absolutely love them). For some reason, I wasn't interested in Warmachne fluff, despite people telling me that it's great. But, as the time went, I realized that I enjoy this game more and more. And so, I got Prime, Esalation, Superiority and Legends very cheap - the only book I'm missing now is Apotheosis. Man, I was missing a lot. These books are great. Even now, with all MK2 books finally printed, those MK1 books are still great to have. The story is interesting and the art is fantastic. Funny thing is that I actually believe that MK1 books were A LOT more interesting that MK2 faction books. It was only because you had all of the model description, fluff and art on one place. That made those books unique. I really miss such format.
Anyway, here's my little collection: