I just read this novel and I can honsetly say this is my kind of SF! Sure there are one or two head-scratching moments (SQR) I-v2/c2 where v=the ship's velocity and c=speed of light) but you can let them ride over your head and enjoy what is essentially a human story; it sounds like a corny back-of-the-book blurb but it is a story of a voyage, a journey across time and space, a story of teamwork and the rewards it brings. But also it is, as a fellow Goodreads contributor, mindblowing!
Basically 50 men and women are chosen for a mission to find a new home around a star in Virgo, and to do so they must travel at as close to c as possible-they gradually get faster and faster but then the ship Leonora Christine, develops a fault meaning they will be unable to decelerate should they reach their destination. They build up a huge velocity and see the universe around them evolving at a staggering rate-months pass on the ship while millenia pass by outside. When the fault is discovered they face a decision, keep speeding ahead in the hope they find a new home eventually or give up and commit mass suicide-it is essentuially a story of survival against the odds.
It is huge conceptually and yet it makes for compelling reading. Definitely a keeper and the kind of book to get you back into SF if you've been away from it!