Winter World by A.G. Riddle quickly had me hoked.

While I don't have any science background, it all felt realistic and believable to me, which was great after my last scifi, that had me roll my eyes a bit at certain parts.

The characters were easy to click with, and felt well rounded, not just the basic charicatures you often get in a crew type of setting.

I was easily hooked by the premise of the book, with the world going into "the long winter" all of a sudden, and we need to find out what happened to survive.
Humanity needs to start to work together to get past this, and they finally do! Or do they?

I did find the very end a bit wobbly, both in the scifi part (to avoid spoilers) as in the return to earth, but overall I really enjoyed the whole book and would happily recommend it.