Halo novels to read before playing 4

I was only 11 years old when Reach came out, and by that point I’d read every expanded universe book I could get my hands on, Fall of Reach, The Flood, First Strike, Ghosts of Onyx, Evolutions, and probably some other ones that I’ve forgotten over the years. So you can imagine that when they announced Halo 4, and they teased the Forerunners, I was ecstatic! However, due to life’s circumstances, it’s only recently that I’ve found the time and motivation to play Halo 4. There have been a ton of books released since then as far as I can tell, and I’m wondering, is the Forerunner trilogy the only thing I need to read, or are there other books recommended to catch up on the universe after the war with the Covenant?