If I had any problem with The Girl with All the Gifts it was the same as I’ve seen elsewhere: It’s very good, but it’s Yet Another Zombie Book.
This, despite being in the same universe, goes way beyond that. The hungries (zombies) aren’t the main feature: here it’s the humans, and what happens to them, and humanity’s discovery of new and different types of hungry, and how we may be wired to screw it all up, always and forever. This book is a real joy – it stands alone, and, if you have a heart, its strings will be tugged.