Name: Timelike Infinity
ISBN: 9780006476184

Stephen Baxter

2000 years in the future, the solar system has fallen under the domination of an alien species, the Quax. But into this world appears a spaceship launched over 1500 years ago, intended to establish a link through which time travel is possible. To the humans this is a chance to reverse time.

Timelike Infinity

Hernando

I've been avoiding Stephen Baxter for a while and thought it was time to give him a try. 

I read this one mostly because of the synopsis and the good reviews about his Xeelee series.

Timelike Infinity and Ring are considered the 'main' story in the timeline between the all 4 books on this sequence. Raft and Flux being more like stand-alone stories. 

I liked the book, lots of extravagant ideas with Wormholes, Singularities and Time travel which I truly enjoyed, even though it was not that easy to follow along the whole universe and time spans. 
It was worth the time.

Update: Now After reading Ring which is another great one, I consider this one just a tiny bit superior than Ring.