A good SF novel.
A classic mystery object appears to cause havoc on Earth, acting as a large scale EMP weapon and frying heaps of tech. Which crashes economies and requires some serious recovery time. It also just happens to be a wormhole to another star system.
Eventually getting it together to get a ship there, it proves to be where another sentient race lives - although apparently not the makers of the object, being of a very low tech level.
So First Contact time and an expert discovers their sound based way of life is hiding something stranger and more dangerous to the whole mission and maybe Earth.
Well worth a look this Phoenix Pick DRM free release. Includes Kiwis! And non monosexuals even. With computer programs like puppies.
A bit better than a 3.5 I'd go as far as.
3.5 out of 5