Whelp, I'll go ahead and say that I think these books are among the very best I've ever read, and Ghosts of Onyx in particular may very well be my favorite book I've ever read.
When I heard two years ago that Halo 4 was going to be including material from some of the books, I found someone at my university who had the first three books (The Fall of Reach, The Flood, and First Strike) and he let me borrow them for a week (that was all the time I needed to read them I loved them so much) and then I went and bought the next set (Contact Harvest, The Cole Protocol, and Ghosts of Onyx) and read those too.
Other than Onyx, I particularly liked First Strike because it finally detailed how in the ******* **** the Master Chief (and Sgt. Johnson) got back to earth after the original game. Also the space battles in The Fall of Reach were just epic. Contact Harvest was also highly interesting and informative as far as how the war itself started, and Sgt. Johnson was pretty bad ass.
One of the best aspects of these books is that many of them are told from multiple perspectives. My favorite of which are the Covenant perspectives which I highly enjoyed, especially one part in Ghosts of Onyx.
So, anybody else read these? I can't stress enough how much I like these books–and I never read books in my free time. Has anybody read any of the newer books like Glasslands?