Just finished re-reading A Clash of Kings by G.R.R. Martin (A Song of Ice and Fire 2). It's a very cool book, but I didn't find it quite as consistently gripping as the first one. The first just has such incredible pacing imo.
Next one up is Caliban's War by James Corey (The Expanse 2). I have seen the TV show, and really liked the first book as well.