I've finally gotten caught up on The Messiah Saga that swept through the X-books over the last couple years thanks to the Marvel hardcover collections. The most recent, Second Coming, came out last month and it's a hell of a good read. I put the finishing touches on my review for it a few minutes ago, and it should be making its way onto the Graphic Novel Reporter site in a few weeks if all goes well. The whole trilogy--Messiah CompleX, Messiah War, and Second Coming--have been a very strong, well-plotted effort and the best crossover event since the 90s. I grew up with X-Men stories like X-Tinction Agenda and Fatal Attractions, and found the Messiah series to be every bit as enjoyable and exciting. The artwork that was being done by Mike Choi and Sonia Oback on the X-Force sections was especially amazing (that series has since been canceled and relaunched as Uncanny X-Force) . That team has some sheer talent that's just remarkable. Take a look at the lines and coloring here, in a before-and-after image from Choi's deviantArt page.
Great stuff! The story is just as good, too. With the mutant race numbering less than two hundred and facing extinction, all eyes are on Hope, the first mutant birth since the genocide that dwindled their numbers in House of M. She may be a messiah, or, quite possibly, the harbinger of doom that will bring about war and destruction, ending the mutant race and destroying mankind. The trilogy is packed with action, and dabbles with time-travel and the future-history introduced in Days of Future Past way back in 1981. There's a lot of history going on in these books, but new readers shouldn't have any problem diving in. Those who know their X-Men lore, though, should find themselves well-rewarded. This series of books may well be the most important X-story of the decade, and the best series of crossovers Marvel and the X-teams have produced in quite some time.