I admit I am a Halo fan but since his novel Eon I’ve been a Greg Bear follower. I was surprised but sceptical to see these two put together but I was willing to give it a chance.
The first few chapters didn’t make sense at first since it implied space-faring humans were involved with Forerunners 100,000 years ago. But eventually that was explained and the idea grew on me.
It’s no Eon, but that may not be fair as it isn’t a pure Bear invention. I certainly enjoyed it enough to want to read the next in the trilogy. I liked the revelation at the end.
Even so, I’d say this is only for diehard Halo fans.