Halo: Primordium

A bunch of cavemen walk around for about 30 chapters and then it gets really good. This book was definitely a lot slower than its predecessor, and it was a bit harder to get through. It maintained the air of mystery about the world but the plot felt lacking until towards the end. However, the last chunk of the book got incredibly good. The interrogation with the Primordial made the slowness of the book until that point worth it.